York Minster is the second largest Gothic cathedral of Northern Europe and clearly charts the development of English Gothic architecture from Early English through to the Perpendicular Period. The present building was begun in about 1230 and completed in 1472. It has a cruciform plan with an octagonal chapter house attached to the north transept, a central tower and two towers at the west front. The stone used for the building is magnesian limestone, a creamy-white coloured rock that was quarried in nearby Tadcaster. The Minster is 158 metres (518 ft) long and each of its three towers are 60 metres (200 ft) high. The choir has an interior height of 31 metres (102 ft).