In the Charter of Basilius II, the only debatable point is the location of Complos (komplos). The latest investigations point to the medieval city Koprijan (Kurvingrad) near the village Orljane to the south from Niš. The fortification (Kurvingrad) is located on the top of the highest hill, on a lower hill near the village Klisura there is a trefoil-based church, to the south of Klisura there is a necropolis with a vaulted crypt discovered so far (the site of the former church of St. Simeon the Stylite), and there is a monastery with at least two churches and a hermit's hut across the fortification on the hill Komiga, on the other bank of the river Morava. Such organized space is characteristic for medieval urban entities.