ceremonial ramps

At the centre of the ramps leading up to the terraces from the northern and southern sides are ceremonial ramps, part of the Imperial Way, featuring elaborate and symbolic bas-relief carvings. The northern ramp, behind the Hall of Preserving Harmony, is carved from a single piece of stone 16.57 metres (54.4 ft) long, 3.07 metres (10.1 ft) wide, and 1.7 metres (5.6 ft) thick. It weighs some 200 tonnes and is the largest such carving in China. The southern ramp, in front of the Hall of Supreme Harmony, is even longer, but is made from two stone slabs joined together – the joint was ingeniously hidden using overlapping bas-relief carvings, and was only discovered when weathering widened the gap in the 20th century