Praca da Liberdade (Liberty Square) has its origins in the early 18th century, and remains one of the most important and beautiful squares in Porto. Anchored by the imposing city hall and its 70 m high clock tower, the Praca is home to several important banks and hotels, the towering 10 m bronze equestrian statue of Pedro IV, several theatres, Cardosa Palace, the hop on hop off ticket offices, and countless pastry shops and cafes. Beautiful buildings and several major shopping streets surround the square, including Avenida dos Aliados. The centrally located square is also close to several major tourists sites, including Torre dos Clerigos, Se Cathedral and Sao Bento Railway Station. Praca da Liberdade is is spotlessly clean, and is one of the 'must see' sites in Porto.