Petko Ogoyski in his collection holding the wooden shoe with a secret hiding-place in which his wife, Jagoda, put medicines and a small pencil and so brought them to the forced labor camp in Belene on Persin Island.  
During the communist period, the materials showing the repressive nature of the communist regime in Bulgaria were hidden at the birthplace of Petko Ogoyski, in the village of Ogoya, located between Sofia and the city of Vratsa. They were openly shown and made known to the public after the political turn in November 1989. After the end of the socialist state, numerous events were organized in which Petko Ogoyski participated and used materials of his collection (s. Events).