 Remains surviving above ground from several imperial tombs of the Han dynasty show traditions maintained until the end of imperial rule.The tomb itself is an "underground palace" beneath a sealed tumulus surrounded by a wall, with several buildings set at some distance away down avenues for the observation of rites of veneration, and the accommodation of both permanent staff and those visiting to perform rites, as well as gateways, towers and other buildings.Tang dynasty tomb figures, in "three-colour" "sancai" glazes or overglaze paint, show a wide range of servants, entertainers, animals and fierce tomb guardians between about 12 and 120 cm high, and were arranged around the tomb, often in niches along the sloping access path to the underground chamber.