Diözesan Museum

At the western end of the Domberg you'll find Germany's largest ecclesiastical museum. The building contains a Fort Knox–worthy collection of bejewelled gold vessels, reliquaries and ceremonial regalia, as well as some exquisite nativity scenes. Pride of place goes to the Lukasbild, a 12th-century Byzantine icon set in its own diminutive silver altar. Rubens and other masters await upstairs.