The Triva Tower, an old fortress building that now houses the police museum, is located in a spacious park. The tower was built to protect the bridgehead of the Bavarian state fortress of Ingolstadt. It was designed by Leo von Klenze, the court architect of King Ludwig I. The building was constructed between 1828 and 1841 and extensively renovated for the 1992 State Garden Show. Fortress, military, police, tower, park.