The village of Biertan (German:Birthalm), first mentioned in an official document in 1283, is home to one of the largest and most impressive medieval strongholds in Transylvania. Surrounded by quaint streets and vineyards, the 15th century fortified church at Biertan is perched high on a hill in the middle of the village. Three tiers of 35-foot-high defensive walls, connected by towers and gates, encircled the complex, making the church impossible to conquer during medieval times. Featuring late-gothic architecture with heavy doors and double exterior walls, the church boasts the largest Transylvanian multi-paneled wooden altar and a remarkable wooden door which once protected the treasures in the sacristy. [read more=”Read more” less=”Read less”] The altar was built by artisans from Vienna (Austria) and Nurenberg (Germany) between 1483 and 1513. The door, a true marvel of engineering, has a particularly ingenious locking mechanism with 15 bolts that can be simultaneously activated by a key. The mechanism stirred quite an interest at the Paris World Expo in 1900. Couples seeking divorce were locked in the Prison Tower for two weeks. Sharing one set of cutlery and one bed, the couple had to make their final decision. In 400 years, only one couple decided afterwards to go through with the divorce!