Çavuştepe, also known as Haykaberd or Çavuştepe Kalesi, is an ancient Urartian fortified site located in Gürpınar District, Van Province, eastern Turkey. It was allegedly built in the 8th century BC by the Urartian king Sarduri II.

The citadel is located on a ridge overlooking the Gürpınar plain and consists of two main parts: the Upper Castle and the Lower Castle. The Upper Castle includes a temple dedicated to the Urartian chief god Haldi, while the Lower Castle contains a palace, warehouses, workshops and another temple dedicated to the god Irmusini.

The site is known for its impressive masonry, with smoothly worked stone blocks that fit together without mortar. Excavations have revealed various structures, including a royal palace, cisterns and a "royal" toilet, indicating the advanced engineering skills of the Urartians.

The 2800-year-old Urartian royal citadel of Çavuştepe, near Van, Turkey, is known for its extraordinary masonry, a hallmark of Urartian architectural ingenuity. Built in the mid-8th century BC under King Sarduri II, Çavuştepe is an example of the advanced stonework techniques developed by the Urartians.

The masonry in place consists of finely cut basalt and limestone blocks, carefully joined together without the use of mortar. This dry stone construction not only ensured durability but also demonstrated the precision and skill of the Urartians.