In Ukraine, they were museums of atheism.

ARNHEM, Netherlands—Two dozen scruffy skateboarders launched perilous jumps in a soaring old church building here on a recent night, watched over by a mosaic likeness of Jesus and a solemn array of stone saints.

http://www.wsj.com/articles/europes-empty-churches-go-on-sale-1420245359?mod=europe_home

Dear Communists, you are destroying the warriors which have allowed you to flourish. When we are gone, you will be in great danger.