Prior to 1474 the names of two towns appear in medieval historical sources, along with their later medieval territories and properties – the towns of Nebojša and Cimski grad. In the early 15th century the county ("župa") of Večenike covered the site of the present-day Mostar along the right bank of the Neretva, including the sites of Zahum, Cim, Ilići, Raštani and Vojno. It was at the center of this area, which in 1408 belonged to Radivojević, that Cim Fort was built (prior to 1443). Mostar is indirectly referred to in a 1454 charter of King Alfonso V of Aragon as "Pons" ("bridge"), for a bridge had already been built there. Prior to 1444, the Nebojša Tower was built on the left bank of the Neretva, which belonged to the late medieval county still known as Večenike or Večerić. The earliest documentary reference to Mostar as a settlement dates from 3 April 1452, when Ragusans from Dubrovnik wrote to their fellow countrymen in the service of Serbian Despot Đorđe Branković to say that Vladislav Hercegović had turned against his father Stjepan and occupied the town of Blagaj and other places, including "“Duo Castelli al ponte de Neretua.”".