The palace of Knossos in Crete was established around 7,000 BC by the Minoan civilization and designed by Dedalos. It had over 1,400 rooms including corridors, baths, workshops and storage rooms. The palace was built using a combination of concrete and stone called ashlar. It featured fresco paintings and was an important trade hub, but was damaged by earthquakes and fire around 1700 BC. Knossos was partially reconstructed in the 1800s and now receives over a million visitors annually.