This Austrian 4 schilling stamp, issued in 1973, honors the centenary of the birth of Leo Slezak (1873–1946), the celebrated Moravian-born operatic tenor. Known for his powerful voice and charismatic stage presence, Slezak was a star of the Vienna State Opera and later performed internationally. The stamp features a finely engraved portrait by A. Pilch and R. Tóth, with a theatrical mask symbolizing his operatic career. Issued by the Republik Österreich, it is part of Austria’s tradition of celebrating cultural icons through philately.