Kleisoura is a mountain village in the municipality Kastoria in Greece. Local traditions relate that it was established at the end of the 15th century by the Vlach inhabitants of 5 small agricultural and pastoral communities lower down and not far away. If that is indeed the case, then the census of nahie Florina from 1481, where 67 male heads of families and 3 widows are registered, is showing us the people who founded the village. Judging by the names of the registered villagers, the inhabitants were of mixed Vlach and Slavic origins, with 3 muslims or islamicised heads of families. Pressure from the Konyar Turks seems to have been the basic reason for this relocation, though the new village seems to have been established with a special permission of the Ottoman authorities, gained with the help of one of the local men, who was apparently in the service of the Sublime Porte. . This suggests that Vlachs may have been living in the area of these two villages since as early as Byzantine times. In late 17th century, the inhabitants of Kleisoura were in all probability Vlachs, which is shown by their connections with the other Vlach villages in West Macedonia, Gramos, Epirus and Albania. In 1900 Vassil Kanchov registers 3400 inhabitants in Kleisoura, all of them Vlachs. Three documents from the Court in Bitola between 1693 and 1695 were sent to the kadis in Kastoria, Florina, Ostrovo, Bitola, Bihlishte and Prespa, who are informed that 80 bandits attacked the home of Aliya in Yasikoy near Komotini in Western Thrace, and they are ordered to catch the bandits. The bandits, around 80, attacked the house of Aliya in Yesikoy, they killed his father Hasan, his brother Hussein and a female slave, robbing 4,000 golden coins, 33 bags full of silver coins and other stuff. The bandits were led by certain Ioan Karakash Papazoglou from Nymphaio. The others in the band came from Kleisoura, Nymphaio and Pisoder. By January 25, 1695, the authorities arrested 5 of these bandits, while the others were hiding in Nikolitsa, Nymphaio, Kleisoura and Gramatikovo.