Over 3,000 churches were built in Poland between 1945 and 1989, despite the socialist state’s hostility towards religion. We call this Day-VII Architecture. Built by parishioners from scavenged or pinched materials, the churches were at once an expression of faith and a form of anti-government protest. Their fantastic designs broke with the state’s rigid urbanism. Neither legal nor prohibited, the construction of churches during this period engaged the most talented architects and craftspeople, who in turn enabled parish communities to build their own houses of worship. These community projects eventually became crucial sites for the democratization of Poland. Unearthing the history of these churches through photog­raphy and interviews with their designers, this publication sheds new light on the architectural dimension of Poland’s trans­formation from state socialism to capitalism.