In between the larger cities of Transylvania lies a little town with a seriously big church. From Sighisoara, you will travel about 25-30 minutes by car. Walk along the cobblestone path, climb the stairs past the museum and book/souvenir shop, and up you go.
Originally Roman Catholic, this fortified church was constructed in the early 1500s and became Lutheran after the Reformation. Biertan is a Unesco World Heritage Site currently holding over 1,500 residents.
Here‘s an official link with video and photos, if you like.