Members of the Seguso family have been leading figures in the manufacture of glass on the Venetian island of Murano since the late 1300s, but for most collectors of vintage design the name evokes two companies formed in the first half of the 20th century. Seguso Vetri d’Arte, born from a small consortium of master glass artisans that included Archimede Seguso (1909–99), thrived under the artistic directorship of Flavio Poli (1900–84), a designer with an eye for modern forms, color and pattern. Vetreria Archimede Seguso, meanwhile, was founded in 1946, when Seguso opened his own atelier in order to employ classical techniques in the making of modern glassware.
The owners of Seguso Vetri d’Arte were justly proud of their skills as craftsmen, but they were not worldly aesthetes — and they knew it. Poli had studied at the Art Institute of Venice, originally working in ceramics before switching mediums and taking up the art of glass. He introduced new simple forms to the genre — the best known of his designs being the Valva, which resembles a clamshell in profile — and employed several novel techniques such as corroso, which gives glass a rough, emery-board-like finish. Poli’s most collectible works are his sommerso pieces, made with a layering process in which clear and colored-glass vessels are “submerged” within one another, producing a kind of nesting-doll effect in striking, elegant vases with bands of separate and overlapped hues.
At his eponymous workshop, Archimede Seguso often favored highly decorative, age-old techniques employed with modern restraint. His layered-glass Losanghe vessels have the look of an abstract checkerboard while his free-form Merletto vases have delicate, lacy patterns created by painstakingly twisting two heated glass straws to create helixes around the walls of the piece.
Though different in their scope and mission, both of these furnaces bearing the Seguso name created some of the most beautiful, alluring and exquisitely crafted works in all of modern design.
Large Seguso Vintage Thick Round Pink 'Scavo' Murano Glass Bowl Ashtray 1980s
By Seguso Vetri d'Arte
Located in Landau an der Isar, Bayern
Stunning soft pink 'a Scavo' white colored / coloured round circular glass bowl, dish or ashtray by Seguso Vetri d'Arte Murano, Italy, circa 1980s. Elegant in form - rather minimalis...
Blown Glass, Murano Glass
$1,505Sale Price|20% Off
Italian Murano Artistic Glass Large Vase by Flavio Poli for Seguso, 1960s
By Seguso Vetri d'Arte
Located in Casale Monferrato, IT
Refined large artistic Murano glass vase in shades of green made by Flavio Poli for Seguso, 1960s. This vase is characterized by a particular design shape. Made with green blown glas...
Murano Glass
Archimede Seguso Murano Green Sommerso Glass Bottle with Stopper
By Seguso Vetri d'Arte, Archimede Seguso
Located in New Windsor, NY
A beautiful example in glass of the refined elegance of an Archimede Seguso design. A light, seafoam green glass perfume bottle and tear drop stopper encased in clear. Ribbed exteri...
Art Glass, Blown Glass
Seguso Huge Pair of Black Murano Glass Bowls / Ashtrays Mario Pinzoni Att. 1980s
By Seguso Vetri d'Arte, Karl Springer
Located in Landau an der Isar, Bayern
Karl Springer style pair of black colored / coloured heavy and thick round glass bowls, dishes or ashtrays by Seguso Vetri d'Arte Murano, Italy, circa 1980s. We have attributed the design to Mario Pinzoni...
Blown Glass, Murano Glass
Flavio Poli & Seguso Vetri d'Arte, Corroso Sommerso Vase, Italy 1957
By Flavio Poli, Seguso Vetri d'Arte
Located in La Teste-de-Buch, Nouvelle-Aquitaine
Flavio Poli & Seguso Vetri d'Arte Corroso (Acid etched) and Sommerso (Different color layers) Vase Made in Italy circa 1957 Literature: Seguso Vetri d'Arte Glass Objects From Murano (1932-1973) - Marc Heiremans...
Blown Glass
$1,127Sale Price|20% Off
Vintage Murano Glass Vase, Sommerso, by Flavio Poli for Seguso, Burgundy
By Flavio Poli, Seguso Vetri d'Arte
Located in Milano, IT
Decorative Vase - Rare Murano Glass - Flavio Poli for Seguso "Sommerso" is a defining style of Murano glassmaking, easily identified by the layers of different colours making up the...
Glass, Art Glass, Blown Glass, Murano Glass
Seguso Murano Sommerso Art Glass Bird Sculpture, Italy, 1950s
By Seguso Vetri d'Arte, Archimede Seguso
Located in Milan, IT
A charming mid-century Murano glass bird sculpture produced by Seguso Vetri d’Arte, Italy, circa 1950s. The figure is executed in the classic sommerso technique, with vibrant cranber...
Murano Glass
Collection of 11 Murano Art Glass Cornucopia by Seguso 1950s-60s
By Archimede Seguso, Flavio Poli, Seguso Vetri d'Arte
Located in Berghuelen, DE
Collection of 11 Murano Art Glass Cornucopia by Seguso 1950s-60s A great Collection of 10 Murano Art Glass Cornucopia by Archimede Seguso for Vetreria Artistica Archimede Seguso and Flavio Poli for Seguso Vetri d'Arte ca. 1950s-60s and one by Cristalleria Santi Murano...
Art Glass, Murano Glass
Flavio Poli Murano Blue Glass Cup for Seguso, Italy, 1961
By Flavio Poli, Seguso Vetri d'Arte
Located in Piacenza, Italy
Wonderful blue cup Alfa Romeo by Flavio Poli for Seguso. Hand blown Murano glass. Bibl.: F. Deboni "Murano 900", Bocca, Milano 1996, pag.229 fig.145 M.Heiremans, Seguso Vetri D'Ar...
Glass
"Tronco" Flavio Poli by Seguso Vetri D'arte 1930s Emerald Murano Glass Vase
By Flavio Poli, Seguso Vetri d'Arte
Located in Brescia, IT
"Tronco" series by Flavio Poli, Seguso Vetri d'Arte 1938 Emerald glass Perfect condition Literature: Rosa Barovier Mentasti "Venetian Glass 1890-1990".
Murano Glass
Large Seguso Vetri d'Arte Murano Sommerso Glass Bowl, 1960s
By Flavio Poli, Seguso Vetri d'Arte
Located in Berghuelen, DE
Large Seguso Vetri d'Arte Murano Sommerso Glass Bowl, 1960s. A very large Murano sommerso art glass bowl. Designed by Flavio Poli or Mario ...
Art Glass, Murano Glass
Seguso Paperweight Murano Glass 1950 Italy
By Seguso Vetri d'Arte
Located in Milano, IT
Seguso paperweight Murano glass 1950 Italy.
Murano Glass
Seguso Vetri d'Arte Ensemble of 'A Scavo' Murano Art Glass Vases and Vessels
By Seguso Vetri d'Arte, Vittorio Rigattieri
Located in Landau an der Isar, Bayern
Wonderful collection / ensemble of 'a Scavo' colored / coloured glass vases and vessels by Vittorio Rigatierri, who took over from Marco Pinzoni as Artistic Director in 1971 until 19...
Blown Glass, Murano Glass
$395Sale Price|20% Off
Seguso Murano Art Glass Bowl 1960 Green Italian Design
By Seguso Vetri d'Arte
Located in Palermo, Sicily
Seguso Murano art glass bowl 1960 green Italian design.
Murano Glass
Flavio Poli for Seguso Sommerso Vase Murano ca. 1960s
By Flavio Poli, Seguso Vetri d'Arte
Located in Berghuelen, DE
Flavio Poli for Seguso Sommerso Vase Murano ca. 1960s A large sommerso art glass vase manufactured by Seguso Vetri D'Arte and designed by Flavio ...
Art Glass, Murano Glass
Flavio Poli by Seguso Amber Green "Sommerso" Murano Glass 1950s Midcentury Vase
By Seguso Vetri d'Arte
Located in Brescia, IT
Flavio Poli by Seguso Vetri D'Arte Murano, Italy 1950s Amber and Green "Sommerso" Vase "Seguso" paper label Perfect condition H 35 cm.
Seguso Vetri d'Arte Ensemble of 'A Scavo' Murano Art Glass Vases and Vessels
By Seguso Vetri d'Arte, Vittorio Rigattieri
Located in Landau an der Isar, Bayern
Wonderful collection / ensemble of 'a Scavo' colored / coloured glass vases and vessels, some of which have been attributed to Vittorio Rigatierri for Seguso Vetri d'Arte Murano, Ita...
Blown Glass, Murano Glass
Flavio Poli Seguso Murano Red Yellow Sommerso Art Glass Vase
By Flavio Poli, Seguso Vetri d'Arte
Located in Barcelona, ES
A wonderful red and yellow hand blown Murano glass vase. Designed by Flavio Poli and manufactured by Seguso Vetri d'Arte. Italy, 1950s. Red glass with a layer of yellow glass cased into clear glass using the Sommerso technique. Amazing organic design and eye-catching colors. Lovely to be used as flower vase or decorative vase. To be exhibited alone or with other vases and bowls as a part of a larger Murano glass collection...
Art Glass, Blown Glass, Murano Glass, Sommerso, Glass
$1,455Sale Price|20% Off
Flavio Poli Seguso Murano Sommerso Red, Yellow & Clear Glass Teardrop Tall Vase
By Flavio Poli, Seguso Vetri d'Arte
Located in Barcelona, ES
A wonderful Sommerso red and yellow hand blown Murano glass teardrop large vase. Designed by Flavio Poli and manufactured by Seguso Vetri d'Arte, Italy, 1950s. Amazing teardrop shape...
Art Glass, Blown Glass, Murano Glass, Sommerso, Glass
Flavio Poli for Seguso Sommerso Vase Murano ca. 1953
By Seguso Vetri d'Arte, Flavio Poli
Located in Berghuelen, DE
Flavio Poli for Seguso Sommerso Vase Murano ca. 1953 A large sommerso art glass vase manufactured by Seguso Vetri D'Arte and designed by Flavio P...
Art Glass, Murano Glass
20th Century Italian Murano Artistic Glass Vase by Flavio Poli for Seguso, 1960s
By Seguso Vetri d'Arte
Located in Casale Monferrato, IT
This exquisite medium-sized vase, designed by Flavio Poli for Seguso in the 1960s, encapsulates the timeless artistry associated with Murano glass. Poli's employment of the 'sommerso...
Murano Glass
$3,951Sale Price|20% Off
Centerpiece in Frosted Blown Murano Glass by Seguso, 1980s, Italy
By Seguso Vetri d'Arte
Located in Villaverla, IT
Centerpiece in Frosted blown Murano glass by Seguso 1980s Italy This extraordinary Murano glass centerpiece was handcrafted in the 1980s by the famous Italian glass-maker Seguso. T...
Bronze
Signed Seguso Vetri D’arte Murano Glass Red Sommerso Vase with Gold Leaf
By Seguso Vetri d'Arte
Located in Ann Arbor, MI
Signed with an original label Seguso Vetri D’Arte Murano Glass Red Sommerso Vase with gold leaf encased in clear. Notice the waffling effect and the glistening gold dust. Rare form f...
Blown Glass
Seguso Vintage Thick Round Pink 'Scavo' Murano Glass Bowl or Ashtray circa 1980s
By Seguso Vetri d'Arte, Karl Springer
Located in Landau an der Isar, Bayern
Stunning large soft pink 'a Scavo' white colored / coloured round circular glass bowl, dish or ashtray by Seguso Vetri d'Arte Murano, Italy, circa 1980s. Elegant in form - rather min...
Blown Glass, Murano Glass
Large Murano Glass Red and Black Striped Vase
By Seguso Vetri d'Arte
Located in Troy, MI
Signed Seguso Murano on the underside of base, this circa 1980s tall, heavy glass vase has stripes of black and red.
Murano Glass
Monumental Huge Signed Seguso Vetri Darte Murano Glass Serving Bowl or Dish
By Seguso Vetri d'Arte
Located in Landau an der Isar, Bayern
Monumental & huge serving bowl or dish signed by Seguso Vetri d'Arte Murano, Italy. Elegant in above all, particularly striking is the huge scale, st...
Blown Glass, Murano Glass
$11,290Sale Price|20% Off
Flavio Poli Valva Vase Model 9826 for Seguso Vetri d'Arte, Italy 1954
By Flavio Poli, Seguso Vetri d'Arte
Located in Milan, IT
Rare Flavio Poli Valva vase Model 9826 for Seguso Vetri d'Arte, Italy 1954 Reference: Seguso Vetri d'Arte / M. Heiremans.
Murano Glass
Mario Pinzoni for Seguso Sommerso Bowl Murano ca. 1969
By Seguso Vetri d'Arte
Located in Berghuelen, DE
Mario Pinzoni for Seguso Sommerso Bowl Murano ca. 1969 A very heavy sommerso glass bowl manufactured by Seguso Vetri D'Arte and designed by Mario Pinzon...
Art Glass, Murano Glass
Seguso Aquarium Murano Glass, 1950, Italy
By Seguso Vetri d'Arte
Located in Milano, IT
Seguso Aquarium Murano glass 1950 Italy.
Murano Glass
Flavio Poli for Seguso Vetri d'Arte Vase Incrociato oro 1949
By Seguso Vetri d'Arte, Flavio Poli
Located in Berghuelen, DE
Flavio Poli for Seguso Vetri d'Arte Vase Incrociato oro 1949 A rare glass vase 'incrociato oro' manufactured by Seguso vetri d'arte and designed by Flavio Poli in 1958. The thick tw...
Art Glass, Murano Glass
Flavio Poli for Seguso Sommerso Vase Murano, circa 1960
By Flavio Poli, Seguso Vetri d'Arte
Located in Berghuelen, DE
A large Venetian Sommerso glass vase manufactured by Seguso Vetri d'Arte and designed by Flavio Poli in the 1960s. Clear and grey Sommerso glass, polished rim. Rests of the 1960s Seg...
Art Glass
Seguso Vetri d'Arte Large Red, Pink Opaline Murano Glass Fruit Bowl circa 1980s
By Archimede Seguso, Alfredo Barbini, Seguso Vetri d'Arte
Located in Landau an der Isar, Bayern
Seguso Vetri d'Arte large vintage murano glass fruit bowl. This is a magical piece of murano glass - measuring a large 28.5cms / 11 inches in d...
Blown Glass, Murano Glass
Flavio Poli Seguso Murano Table Lamp
By Seguso Vetri d'Arte
Located in New York, NY
A rare extra large Seguso Murano table lamp with pink and purple hues, model 14092 by Flavio Poli. Circa 1968-1969 this extraordinary lamp f...
Nickel
Seguso Pair of Thick Round Pink 'Scavo' Murano Glass Bowls or Ashtrays 1980s
By Karl Springer, Seguso Vetri d'Arte
Located in Landau an der Isar, Bayern
Stunning large nearly matching pair of soft pink toned 'a Scavo' round circular glass bowls, dishes or ashtrays with white powdered scavo finish by Seguso Vetri d'Arte Murano, Italy,...
Blown Glass, Murano Glass
$1,129Sale Price|20% Off
Vintage Murano Glass Vase, Sommerso brown drop glass, by Flavio Poli for Seguso.
By Flavio Poli, Seguso Vetri d'Arte
Located in Milano, IT
Sculptural Decorative Vase - Rare Murano Glass - Flavio Poli for Seguso "Sommerso" is a defining style of Murano glassmaking, easily identified by the layers of different colours ma...
Glass, Art Glass, Blown Glass, Murano Glass
Seguso Vintage Thick Round Amber 'Scavo' Murano Glass Bowl or Ashtray, C. 1980s
By Seguso Vetri d'Arte, Karl Springer
Located in Landau an der Isar, Bayern
Stunning Karl Springer style brown amber 'a Scavo' white colored / coloured round circular glass bowl, dish or ashtray by Seguso Vetri d'Arte Murano, Italy, circa 1980s. Elegant in f...
Blown Glass, Murano Glass
$2,000Sale Price|42% Off
Signed Seguso Scavo Corroso Vase with Handles
By Seguso Vetri d'Arte
Located in Palm Springs, CA
A stunning signed Seguso Scavo or Corroso vase with handles. It quite heavy and lovely.
Art Glass
Seguso Vintage Springer Style Square Black Murano Glass Bowl Dish Ashtray 1980s
By Seguso Vetri d'Arte, Karl Springer
Located in Landau an der Isar, Bayern
Petite Karl Springer style black colored / coloured square vintage mid-century modern Murano glass bowl, dish or ashtray by Seguso Vetri d'Arte Murano, Italy circa 1980s. Elegant and...
Blown Glass, Murano Glass
Seguso Large Springer Style Square Black Murano Glass Bowl Dish Ashtray 1980s
By Karl Springer, Seguso Vetri d'Arte
Located in Landau an der Isar, Bayern
Large Karl Springer style black colored / coloured square Murano glass bowl, dish or ashtray by Seguso Vetri d'Arte Murano, Italy, circa 1980s. Elegant and simplistic in form. Black ...
Blown Glass, Murano Glass
Seguso Pair of Thick Round Amber 'Scavo' Murano Glass Bowls or Ashtrays 1980s
By Seguso Vetri d'Arte
Located in Landau an der Isar, Bayern
Stunning near pair of burnt caramel brown amber toned 'a Scavo' round circular glass bowls, dishes or ashtrays with white powdered scavo finish by Seguso Vetri d'Arte Murano, Italy, circa 1980s. Elegant in form - rather minimalist but with the obvious sign of quality with the thick and heavy lip of the glass and the use of the 'Scavo' technique to replicate to look and feel of ancient Roman...
Blown Glass, Murano Glass
Seguso Vintage Thick Round Amber 'Scavo' Murano Glass Bowl or Ashtray, C. 1980s
By Seguso Vetri d'Arte
Located in Landau an der Isar, Bayern
Stunning honey brown amber 'a Scavo' white colored / coloured round circular glass bowl, dish or ashtray by Seguso Vetri d'Arte Murano, Italy, circa 1980s. Elegant in form - rather minimalist but with the obvious sign of quality with the thick and heavy lip of the glass and the use of the 'Scavo' technique to replicate to look and feel of ancient Roman archeological...
Blown Glass, Murano Glass
Seguso Huge Square Black &. White 'Scavo' Murano Glass Bowl Springer Style 1980s
By Seguso Vetri d'Arte, Karl Springer
Located in Landau an der Isar, Bayern
Huge and rare Karl Springer style black colored / coloured square Murano glass bowl, dish or ashtray with white 'a Scavo' finish by Seguso Vetri d'Arte Murano, Italy, circa 1980s. Elegant and simplistic in form and showing extraordinary workmanship with the use of the 'Scavo' technique to replicate to look and feel of ancient Roman archeological glass. This technique was achieved by throwing a mixture of. chemical powders on the hot glass whilst on the melt. This is a very large bowl...
Blown Glass, Murano Glass
Set of six Seguso Murano Glass flute with gold leaf twisted steam detail
By Seguso Vetri d'Arte
Located in Murano, Venice, IT
Set of six Seguso Murano Glass flute with gold leaf twisted steam detail
Murano Glass, Blown Glass
Seguso Vetri d'Arte Murano Sommerso Glass Bowl 1960s
By Seguso Vetri d'Arte, Flavio Poli
Located in Berghuelen, DE
Seguso Vetri d'Arte Murano Sommerso Glass Bowl 1960s Item e7099 An asymetric Murano sommerso art glass bowl. Attributed to Flavio Poli and Seguso Vetri d'Arte circa 1950s. Manufactur...
Art Glass, Murano Glass
Set of Glasses and Carafe in Murano Glass by Seguso Vetri d'Arte
By Flavio Poli, Seguso Vetri d'Arte
Located in Asti, Piemonte
Set of six glasses and bottle in pulegoso glass designed by Flavio Poli for Seguso Vetri d'Arte in 1940. The dimensions of the carafe are H 30 cm x Diameter 18 cm. Biography Designe...
Murano Glass
Flavio Poli Seguso Red Orange Sommerso Murano Art Glass Vase
By Flavio Poli, Seguso Vetri d'Arte
Located in Barcelona, ES
Sculptural Murano art glass vase in shades of Red and Orange. Designed by Flavio Poli and manufactured by Seguso Vetri d'Arte. Italy, 1950s. Vibrant colors: Red and orange glass with...
Glass, Art Glass, Blown Glass, Murano Glass, Sommerso
Mid-Century Modern Handblown Candlestick by Seguso Vetri d'Arte
By Seguso Vetri d'Arte
Located in New York, NY
This Mid-Century Modern Murano glass candlestick was hand blown by the venerable artisans at Seguso Vetri d'Arte. Founded in the fourteenth century, Seguso Vetri d'Arte continues to ...
Murano Glass
Set of Glasses and Bottle in Murano Glass by Seguso Vetri d'Arte
By Flavio Poli, Seguso Vetri d'Arte
Located in Asti, Piemonte
Set of six glasses and bottle in pulegoso glass designed by Flavio Poli for Seguso Vetri d'Arte in 1940. The dimensions of the bottle are H 22 cm x W 14 cm x D 6 cm Biography Design...
Murano Glass
Seguso Vetri dArte Murano glass circa 1950
By Seguso Vetri d'Arte
Located in Rio De Janeiro, RJ
Incredible vase in Murano glass original from the fifths by Seguso Vetri dArte. Perfect condition.
Murano Glass
Rare Cartoccio con Bolle Incamiciato, "Paperbag" Glass Vase, Seguso Murano 1950'
By Archimede Seguso, Seguso Vetri d'Arte
Located in Bochum, NRW
"Cartoccio con bolle incamiciato". "Paperbag" vase (Cartoccio), around 1950 Design by Archimede Seguso Execution Seguso Vetri d'Arte Encased glass vase (incamiciato), irregularly sha...
Glass, Blown Glass
Vase in Murano Glass by Seguso Vetri d'Arte 1950
By Seguso Vetri d'Arte
Located in Rio De Janeiro, RJ
Incredible vase in Murano glass by Seguso Vetri d'Arte circa 1950
Murano Glass
Seguso Vase Green Murano Glass, 1950, Italy
By Seguso Vetri d'Arte
Located in Milano, IT
Seguso vase green Murano glass, 1950, Italy.
Murano Glass
Murano Art Glass Jug by Flavio Poli for Seguso Vetri d'Arte ca. 1962
By Flavio Poli, Seguso Vetri d'Arte
Located in Berghuelen, DE
Murano Art Glass Jug by Flavio Poli for Seguso Vetri d'Arte ca. 1962 A Murano art glass jug designed by Flavio Poli for Seguso Vetri d'Arte ca. 1962. Cristallo antico...
Art Glass, Murano Glass
Mid-20th Century Murano Blown Glass Elongated Tear Drop Form Vase
By Flavio Poli, Seguso Vetri d'Arte
Located in Chapel Hill, NC
Mid-20th century Murano blown glass elongated tear drop form vase. Cased light purple-cranberry to clear stem. Attributed to a Flavio Poli design for Seguso Vetri d'Arte, Italy. 10.2...
Blown Glass
Vintage Seeguso Vetri D' Arte Murano Cased Pulegoso Glass Bowl, Turquoise, Gold
By Seguso Vetri d'Arte
Located in North Miami, FL
This beautiful and special rare Italian vintage Murano glass bowl has it all going on. It is the work of Seguso. It has several different techniques in one; one is the Pulegoso. The ...
Glass
Italian Gold and Emerald Green Glass Candlesticks by Flavio Poli for Seguso
By Seguso Vetri d'Arte, Flavio Poli
Located in New York, NY
Pair of Italian handblown gold and emerald glass candlesticks by Flavio Poli for Seguso, Italy, circa 1970s.
Blown Glass
1960s Ruby and Bronze Italian Murano Glass Vases for Seguso, Italy
By Flavio Poli, Seguso Vetri d'Arte
Located in Arosio, IT
A set of two midcentury vases, one still bearing the label of Seguso Vetri and the number of the model (14345) are a great example of the art of Seguso's creative director Flavio Pol...
Murano Glass
Flavio Poli for Seguso Vetri d'Arte Blown Glass Vase Model 7609, Italy, 1940s
By Seguso Vetri d'Arte, Flavio Poli
Located in New York, NY
Seguso Vetri d'Arte elegant glass vase model 7609, Italy, circa 1942. This Murano blown glass vase was made using the cordonato ritorto technique of gently twisting ribbed glass in a...
Art Glass, Blown Glass, Murano Glass
Seguso Vetri D'Arte White Opalescent Glass Vase, Italy 1950s
By Seguso Vetri d'Arte
Located in Milan, IT
Seguso Vetri D'Arte White Opalescent Glass Vase, Italy 1950s
Murano Glass
Vintage Murano Art Glass Sculpture of a Venetian Carnivalist, Seguso ca. 1940s
By Flavio Poli, Seguso Vetri d'Arte
Located in Berghuelen, DE
Vintage Murano Art Glass Sculpture of a Venetian Carnivalist, Seguso ca. 1940s Item e7102 A rare art glass sculpture from the Venetian carnival manufactured most probably by Seguso V...
Art Glass, Murano Glass