Malevich exhibited his first "Black Square", now at the Tretyakov Gallery in Moscow, at the Last Futurist Exhibition 0,10 in Petrograd (Saint Petersburg) in 1915. A black square placed against the sun appeared for the first time in the 1913 scenic designs for the Futurist opera "Victory over the Sun". The second "Black Square" was painted around 1923. Some believe that the third "Black Square" (also at the Tretyakov Gallery) was painted in 1929 for Malevich's solo exhibition, because of the poor condition of the 1915 square. One more "Black Square", the smallest and probably the last, may have been intended as a diptych together with the "Red Square" (though of smaller size) for the exhibition Artists of the RSFSR: 15 Years, held in Leningrad (1932). The two squares, Black and Red, were the centerpiece of the show. This last square, despite the author's note "1913" on the reverse, is believed to have been created in the late twenties or early thirties, for there are no earlier mentions of it.