Architecture was extinct in Greece from the end of the Mycenaean period (about 1200 BC) to the 7th century BC, when plebian life and prosperity recovered to a point where public building could be undertaken. But since many Greek buildings in the colonization period (8th - 6th century BC), were made of wood or mud-brick or clay, nothing remains of them except for a few ground-plans, and almost no written sources on early architecture or descriptions of these embryonic buildings exist.