The historic town of Gjirokastra, in the Drinos river valley in southern Albania, is a rare example of a well-preserved Medieval town, built by farmers of large estate. The 13th-century citadel provides the focal point of the town with its typical tower houses (Turkish kule). Characteristic of this region, Gjirokastra contains a series of outstanding examples of kule, a type of building which crystallized in the 17th century. But Gjirokastra also features some more elaborate examples from the early 19th century. The kule has a tall basement, a first floor for use in the cold season, and a second floor for the warm season. Interiors feature rich decorative details and painted floral patterns, particularly in the zones reserved for the reception of visitors. The town also retains a bazaar, an 18th-century mosque and two churches of the same period.