world-renowned stained glass artist, painter, and teacher. His father was a captain in the Lithuanian army. In 1942–1944 he studied at the Kaunas Institute of Applied and Decorative Arts, in the studio of Stasys Ušinskas. After moving to Germany, in 1945–1947 he studied architecture at the Darmstadt Higher Technical School. This knowledge later came in handy for him as a stained glass artist. In 1947–1949 he studied painting at the School of Arts and Crafts (École des Arts et Métiers) in Freiburg.
Since 1949 he has lived in the USA. He studied at Karl Hackert's stained glass studio in Chicago. In 1952–1953 he attended a lithography course at the École des Beaux-Arts in Paris. In 1953 he married Anna Mary Crewdson (1927–2009) in Paris.
1953–1980. worked at George Durham's stained glass studio in New York. 1973–1984. taught at Fordham University in the Bronx (New York State), 1982–1990. at Parsons School of Design in New York. Since 1972. Chairman of the Lithuanian Artists' Union of New York. Traveled the USA, Canada, and Japan with lectures and seminars on the art of painting on glass and stained glass. He held individual exhibitions in New York (1976, 1983), South Hadley (Massachusetts State, 1977), Bloomfield (Connecticut State, 1983), and Boothbay Harbor (Nevada State, 1992). 1970. crossed the Atlantic Ocean (from New York to Ireland) with D. Fuller on a 10-meter sailboat. In 2006, a documentary film "Divine Light" was created (dir. Gytis Lukšas). Created stained glass windows and mosaics in churches in New York (St. Catherine of Siena, 1954, Annunciation of Christ, 1967), Washington (Shiluva Chapel of the Holy Virgin Mary, 1965), Rockefeller University (1975, 1981), the Mausoleum of the Heaven's Gate Cemetery in East Hanover (New Jersey, 1991) and elsewhere. The stained glass windows have a free composition; the figures are not divided by lead strips, similar to paintings. A. Elskaus's works have been acquired by the Corning Museum of Glass in the USA, the Ely Stained Glass Museum in England, the Pilchuk Glass Studio, the M.K. Čiurlionis National Museum of Art, and various private collectors.