The old Turkish Bazar lies north of the Vardar river, northeast of the Macedonia square. Here is where most historic, Ottoman era buildings are located. These were built after the Ottoman conquest of Skopje in 1392. The Skopje fortress or Kale fortress lies on a hill overlooking Skopje. The first fortress was built in 6th century AD under the Byzantine emperor Justinian I. It was further expanded in 10th and 11th centuries and later in the Ottoman period. From the fortress there is a good view of Skopje and the Vardar river.