Located in the heart of Wiesbaden's city center, Mauritiusplatz deserves special attention.

Its history dates back to Roman times: Emperor Claudius founded the first Roman fortification there in 41 AD. In the 8th/9th century, a Carolingian hall building stood on the square, followed by a three-aisled Romanesque basilica in the 10th century. The Mauritius Church was first mentioned in the 13th century, making it the oldest church in Wiesbaden. Its name goes back to Saint Mauritius, who spread Christianity in the region in the 3rd century. Around 1488, the old church was replaced by a new one with a three-storey tower, which Prince August Samuel again had renovated and enlarged as a result of the Thirty Years' War. The church building had to be repeatedly repaired until it fell victim to a fire in 1850. Only the sarcophagus of Duchess Elisabeth was saved.

Today, a plaque commemorates the former Mauritius Church.