Some time ago, an interesting discovery was made by archaeologist on the Aegean island of Kea. An American team explored a temple which stands in an ancient city on the promontory of Ayia Irini. The city at one time must have been prosperous, for it enjoyed a high level of civilization. Houses – often three storeys high – were built of stone. They had large rooms with beautifully decorated walls. The city was even equipped with a drainage system, for a great many clay pipes were found beneath the narrow streets.