My unesco collection from Poland is now complete with this card sent by Joanna.
This is the Evangelical Church of Peace in Swidnica, built in 1656-1657 and a Unesco World Heritage Site since 2001 together with the Jawor Church.
"The Churches of Peace in Jawor and Swidnica in Silesia were named after the Peace of Westphalia of 1648 which permitted the Lutherans in the Roman Catholic parts of Silesia to build three Evangelical churches from wood, loam and straw outside the city walls, without steeples and church bells. The construction time was limited to one year." - in: wikipedia