Its historic layout boasts a wealth of art nouveau architecture and over 1,300 timber-framed houses from a period spanning eight centuries. One of the oldest of these buildings, which dates back to around 1340, houses the medieval architecture museum.
The Collegiate Church of St Servatius, burial site of the first German king Henry I and his wife Mathilde, the renowned cathedral treasury and St. Wigbert's Crypt are masterpieces of Romanesque architecture and a legacy of the Saxonian-Ottonian ruling dynasty.
The world heritage site also embraces the old town, St. Wigbert's Church and Burgberg and Münzenberg hill. All have been a UNESCO-World Heritage site since 1994.