O Petr Published 02/03/2021 at 1789 × 1246 in Object of the Month: February 2021 ← Previous Next → Temperance postcard with a picture by Otto Petr 1893-1971) and a quotation from T. G. Masaryk’s response to a 1925 survey on “sobering Slovakia”, Brno, 1928. NML Medical Museum, 17/2021.