The mustard-yellow Theatinerkirche, built to commemorate the 1662 birth of Prince Max Emanuel, is the work of Swiss architect Enrico Zuccalli. Also known as St Kajetan's, it's a voluptuous design with two massive twin towers flanking a giant cupola. Inside, an ornate dome lords over the Fürstengruft (royal crypt), the final destination of several Wittelsbach rulers, including King Maximilian II (1811–64). The building was receiving much-needed renovation at the time of research but was still open to the public.