The church features a gargantuan pipe organ designed and constructed by the German organ builder Johannes Klais of Bonn. Standing tall at an impressive 15m and weighing a remarkable 25 tons, this mechanical action organ is driven by four manuals and a pedal, 102 ranks, 72 stops and 5275 pipes, all designed to reproduce powerful notes capable of filling the huge and holy space with a range of tones. lts construction was completed in December 1992 and has since been utilised in a variety of recordings.
Securiton has protected the site with an early warning system featuring four highly sensitive SecuriRAS ASD 535 aspirating smoke detectors. Some of the sampling points are placed within the void between the tiled roof and the dome and connected to the main tube via thermally isolated capillary tubes.