The ancient Greeks, like the Egyptians and the Mesopotamians, tended to build most of their common buildings out of mud brick, leaving no record behind them. However many structures do survive, some of which are in a very good state of repair, although some have been partly reconstructed or re-erected in the modern era. The most dramatic is the Greek Temples. The Greeks made many advances in technology including plumbing, the spiral staircase, central heating, urban planning, the water wheel, the crane, and more.