In order to protect themselves from Tartars and Turks, the Saxons built over 300 fortress churches in the region. St Margaret fortified church is the largest, with a double perimeter wall and five towers added in 1450, including the curiously slanted, 68m-tall Trumpeters' Tower. Inside, note the remarkable collection of 15C-17C Ottoman carpets, Baroque pulpit, and four superb retables, three of which come from surrounding villages.