Standing just outside the city walls, the neo-Gothic Guildhall was originally built in 1890, then rebuilt after a fire in 1908. Its fine stained-glass windows were presented by the London livery companies, and its clock tower was modelled on London's Big Ben. Inside, there's a historical exhibition on the Plantation of Ulster, and a tourist information point.
As the seat of the old Londonderry Corporation, which institutionalised the policy of discriminating against Catholics for housing and jobs, the Guildhall incurred the wrath of nationalists and was bombed twice by the Irish Republican Army (IRA) in 1972. From 2000 to 2005 it was the seat of the Bloody Sunday Inquiry.