Lazar's son and successor Stefan Lazarević managed the despotate from Kruševac until 1405, when the capital was moved to Belgrade, which he began renewing and refortifying in that year.

The massive casualties inflicted on the Ottomans prompted Sultan Mehmed the Conqueror to personally reinforce his offensive using his entire Rumelian army.

Under Ottoman rule, Kruševac was renamed Aladža Hisar, Turkish for Colorful City, because of the diversity of materials from which the fortress was built.

Inside the towers today are a hallway with a staircase still remains; this once gave access to higher levels and to an exit onto the city walls.

One of the curiosities of this particular tower was that it was plastered with pebbles, a rare style and probably one of the reasons that prompted the Turks to name the fortress "Colorful City".