Ballerina On Horse (1975) by Tadeusz Jodlowski:
Lion Standing On CYRK (1978) by Hubert Hilscher:
Two Headed Woman (1974) by Witold Janowski:
Two Seated Chimps (1966) by Maciej Urbaniec:
Contortionist (1975) by Jerzy Czerniawski:
Dancer On Tightrope (1967) by Wiktor Gorka:
Apartment Therapy is one of my favorite guilty online pleasures & the original source of this post...
Vintage Polish Circus Posters at Contemporary Posters.