|Vigles, also called Friktories, were watchtowers important to the system of defense of the island from the early 11th up to early 19th century AD. They are cylindrical buildings, except of the Koula’s Vigla in the fortress of Chios that is semi-cylindrical, of 12 to 20 m. high, with a 15m. diameter. If a Viglatoras (watcher) had seen an enemy ship he was notifying other Vigles by lighting up a fire (at night) or by smoke signals (in the day) so that the villagers had the time to prepare their defense. Therefore the were woods in the interior of the Vigla in order the Viglatoras to be able to start signaling at once. In the interior they were filled with rubbles up to 2/3 of their height.|
|Vigles had no gates or any other entering point . The watcher, Viglatoras, had to throw a rope with a cramp in order to enter the Vigla. By having no doors, and therefore a point that if violated could allow to the enemies, usually pirates to enter and kill the men in the Vigla the lightly armed Viglatores could successfully rebut any attack. |
There were about 50 Vigles on Chios island. They were fully covered the bays that an enemy ship could approach the island as well as the open sea. from the top of each Vigla the Viglatoras could clearly see the next two Vigles, one of each side. The Vigles at the northern part of the island are almost destroyed, but they are very well preserved at the south and especially at the Southwest part of the island.