The towers of Mykonos attest to the existence of a very old defense system that protected the farmhouses and the settlements of the countryside. The tower of Linos is the most important one of them. An ancient marble column with the so-called “inscription of the Synoecism” carved on it was found here in 1873. The second most notable tower is located at Portes, over Platis Gialos. It is circular and has three granite stone blocks.