Mesta is a Greek traditional village in Chios. It belongs to Mastic Villages a group of villages in South Chios where the main activity is the agriculture of mastic.Mesta is characterised by particular architecture since it is a village-castle with perfectly preserved medieval architecture.The village was probably built in the 12th century during Byzantine era. The architecture of settlement with the narrow streets and the perimetric fortification served to repel the pirate raids. The street plan of the village is pentagonical and the many narrow roads inside the fortification give the impression of a labyrinth.