The Minoan settlement on the island dates back to 1450 from ruins which have been found on the Seragia hill (today’s old town). The dead city which was found in the South Western part of the city also belongs to the same period. The settlement of the 7th and 6th century BC took up the largest area of the shrinking geometrical settlement.

One of the most important findings of the ancient period was the sanctuary which was found in the area of Iraklis along with many other important offerings, some from Egypt and Syria. The sanctuary was dedicated to feminine divinity.

The wall of the ancient city of Kos has the shape of a ring with a perimeter of about 4 kilometres. The wall surrounded a residential area and also a large area of the south of the city with fields and gardens. Parts of the northern side of the wall can be visited today at the Limenis archaeological site. It shapes a crooked line which follows the curve of the coast of the harbour. It’s made of big rectangular stones and has a height of 4 of these stones. The two towers were found in this area, one a rectangular the other a semi-circle.