The center of Minoan civilization and capital of Minoan Crete lay 5km south of Heraklion. Knossos flourished for approximately two thousand years. It had large palace buildings, extensive workshop installations and luxurious rock-cut cave and tholos tombs. As a major center of trade and the economy, Knossos maintained ties with the majority of cities in the Eastern Mediterranean. Wealth accumulation and the advancement of an urban lifestyle were the hallmarks of this zenith, which began circa 2000 BC and was typified by magnificent monumental buildings and a complex social structure.