The "Royal Villa" at Ayia Triada which is situated very close to Phaistos, was built in about 1550 BC. i.e. just before the new palace at Phaistos, and was destroyed by fire in l450 BC, like all other important Minoan centres. It succeeded the first palace at Phaistos as the economic and administrative centre of the regions depriving the new palace there of this role, and appears to have had connections with Knossos. The two wings, with an open-air space between them, consisted of groups of interconnecting rooms (polythyra), storerooms and stairways. On the site of the ruins, a Mycenaean megaron, the so-called "Agora" and an open - air shrine were subsequently built.
In the villa's disaster layer from the fire in 1450 BC, excavation revealed a valuable group of exceptional works of art, precious materials, records in Minoan script and seals. The famous black serpentine vessels, the "Harvesters' Vase", the "Boxers' Vase" and the "Chieftain ‘ s Cup", the wall paintings depicting the natural landscape, the sarcophagus, the bronze and clay figurines of worshipers and the copper ingots from the Treasury are among the most noteworthy findings.

Monastiraki lies in the valley of Amari, on the natural route leading from northern Crete to the Messara plain. Excavations have brought to light a centre of the Old Palace period (1950-1700 B.C.). which was destroyed by fire following an earthquake. The large number of storerooms and the existence of two archive rooms with many clay sealings indicate a palatial character for the site. Other finds on the top of a neighbouring hill suggest there must have been a religious centre in the area, as well.