part of ancient Urgench and it consists of a complex of monuments, all constructed in different periods of time, from the 14th to the 19th centuries. Ak-Kala Ak-Kala is a fortress located southwest of the ruins of medieval Urgench. Its walls, whose height ranges from 6 to 8 meters, and which measure approximately 2 meters at the top, stretch on more than a kilometre. They were built with sun dried mud-bricks and their corners are decorated with semi-circular towers, whilst the inner side of the fortress wall is sustained by buttresses. Khorezm-Bag This is a quadrangular fortress, erected by Khan Muhammed Emin, measuring 400 by 500 meters, and was built in the mid-19th century in the south-western outskirts of Kunya-Urgench. It is surrounded by a high defensive wall which has been severely eroded by the passing of time. Kunya Urgench Museum (Dash Mosque) The museum is located in the brick structure the Dash Mosque, a former madrasa constructed in the early 20th century. It was built as a mosque and it served as a madrasah before it was turned into a site museum in the 1990s. Its structure is mainly square, with a multitude of rooms opening into a large courtyard, and which now house various exhibits. The museum displays focus on the history of the site, on traditional arts and crafts of the region, on the building tradition of Urgench, etc. The largest room is dedicated to the history and treasures of the old city, including a comprehensive miniature model of Gurgench and a variety of artefacts such as ceramic bowls, glazed tiles, children's toys, or Arabic texts. Another important room centres around the Dash Mosque and the history of its construction and use. Around the courtyard, behind the main building, the remaining smaller rooms, formerly the bedrooms of the students at the madrasa, have been converted into 19 displays explaining the traditional handicrafts of the region such as carpet making, pottery, Yurt construction, etc. Building tradition Kunya Urgench has been, for a long period of time, a prolific school of construction masters. The knowledge and skills of this school have spread, throughout the centuries, amongst the Muslim world, and can be recognised in the structures and decorations of many buildings from the Timur period, both within Turkmenistan, and in regions such as Uzbekistan, Afghanistan, Transcaucasia, Turkey, Iran, Pakistan and India. For example, a multitude of buildings in Samarkand