The Dubrovnik Bell Tower, built in 1444, is one of the symbols of the free city state of Ragusa. It was built by the local architects Grubačević, Utišenović and Radončić. It was rebuilt in 1929 as it had lost its stability through an earthquake and was in danger of falling. The brass face of the clock shows the phases of the moon. Two human figures strike the bell every hour. The tower stands next to the House of the Main Guard, also built in Gothic style. It was the residence of the admiral, commander-in-chief of the army. The Baroque portal was built between 1706 and 1708 by the Venetian architect Marino Gropelli (who also built St Blaise's church).