Guildhall Located in the heart of the city, but just outside the walls, it dates from 1887. The original building, named in honour of the London guilds was officially opened in 1890 as the administrative centre of the Londonderry Corporation but was destroyed in 1908. The building stands on land reclaimed from the River Foyle. The Guildhall houses Mayor’s Office and council chamber. The red sandstone building is of neo-gothic architecture; with Tudor overtones. In 1972, the Guildhall was destroyed by a number of bomb attacks and carefully restored and reopened in 1978. The interior houses some of the finest examples of stained glass windows in Ireland with many having been restored using the original watercolour designs.