The citadel hill of Sighisoara is the best-preserved medieval town fortress in Transylvania and the largest continuously inhabited medieval fortress in Europe. Built from the 12th century by Saxon colonists, the historic center remains almost unchanged. A defensive system of 930 m walls with 14 towers and bastions was built in the 14th-15th centuries, with guild contributions. Today it features cobbled streets, pastel houses, historic buildings, cafes, and lodging. UNESCO World Heritage Site since 1999.