Copenhagen’s first City Hall was in the early 13th century. The sixth and current rådhus was built in 1905 by architect Martin Nyrop. The design is similar to a town hall in Siena, Italy. Inside are the offices of the municipal government, council and lord mayor. You can walk inside for a free self-guided stroll or, better yet, sign up for one of the tours. Then, check out this delightful inner courtyard.