In 1978 UNESCO placed the Main Square as part of the Old Town Kraków on the list of World Heritage Sites . On 21 March 1980 , in time of political tension and the run-up to the declaration of the Martial Law in Poland , Walenty Badylak , retired baker and a veteran of Poland 's wartime underground Home Army , set himself alight chained to a well in the Main Square . Badylak was protesting the communist government 's refusal to acknowledge the Katyn 's war crime . Also , the Main Square was central in staging mass demonstrations of the Solidarity movement . In 2013 Lonely Planet travel guides rated Kraków 's Main Market Square as the most beautiful in the world
Katyn
Katyn massacre
Main Square, Kraków