Hallgrímskirkja church is Reykjavík's main landmark and its tower can be seen from almost everywhere in the city.The church features, most notably, 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 - from the dulcet to the dramatic. Its construction was completed in December 1992 and has since been utilised in a variety of recordings, including some by Christopher Herrick.