The lovely and elegant Christ Church is a centre of worship for the United Diocese. Construction for this cathedral began in 1038 by King Sitric Silkenbeard while the city was under Danish Viking rule. This was only one of two churches within the walls of Dublin at the time construction began. A chapel to St. Laurence O'Toole was added in the 1200s and much of the current nave was built in the 1230s. Mass was given in Latin until 1560 when English was first used. Today part of the nave has caved in due to the weak peat foundation on which it was built, and though the North wall survives, it visibly lists. The cathedral was finally renovated in Victorian times with funding from a distiller. Christ Church also contains the largest cathedral crypt (63.4m long) in or , which was constructed in 1172-1173. Having been renovated in the early 2000s, it is now open for visitors.