Although mostly only ruins of brick and rammed earth walls and towers from ancient China (i.e. before the 6th century AD) have survived, information on ancient Chinese architecture (especially wooden architecture) can be discerned from more or less realistic clay models of buildings created by the ancient Chinese as funerary items. This is similar to the paper joss houses burned in some modern Chinese funerals. The following models were made during the Han Dynasty (202 BC – AD 220):