Pope Pius II and the Venetians (who had sent money to finance a campaign against the Ottoman Empire), Corvinus presented three letters, allegedly written by Vlad on 7November 1462, to MehmedII, Mahmud Pasha, and Stephen of Moldavia. According to the letters, Vlad offered to join his forces with the sultan's army against Hungary if the sultan restored him to his throne. Most historians agree that the documents were forged to give grounds for Vlad's imprisonment. Corvinus's court historian, Antonio Bonfini, admitted that the reason for Vlad's imprisonment was never clarified. Florescu writes, "[T]he style of writing, the rhetoric of meek submission (hardly compatible with what we know of Dracula's character), clumsy wording, and poor Latin" are all evidence that the letters could not be written on Vlad's order. He associates the author of the forgery with a Saxon priest of Brașov. Vlad was first imprisoned "in the city of Belgrade" (now Alba Iulia in Romania), according to Chalkokondyles. Before long, he was taken to Visegrád, where he was held for fourteen years. No documents referring to Vlad between 1462 and 1475 have been preserved. In the summer of 1475, StephenIII of Moldavia sent his envoys to Matthias Corvinus, asking him to send Vlad to Wallachia against Basarab Laiotă, who had submitted himself to the Ottomans. Stephen wanted to secure Wallachia for a ruler who had been an enemy of the Ottoman Empire, because "the Wallachians [were] like the Turks" to the Moldavians, according to his letter. According to the Slavic stories about Vlad, he was only released after he converted to Catholicism. Third rule and death Matthias Corvinus recognized Vlad as the lawful prince of Wallachia, but he did not provide him with military assistance to regain his principality. Vlad settled in a house in Pest. When a group of soldiers broke into the house while pursuing a thief who had tried to hide there, Vlad had their commander executed because they had not asked his permission before entering his home, according to the Slavic stories about his life. Vlad moved to Transylvania in June 1475. He wanted to settle in Sibiu and sent his envoy to the town in early June to arrange a house for him. MehmedII acknowledged Basarab Laiotă as the lawful ruler of Wallachia. Corvinus ordered the burghers of Sibiu to give 200 golden florins to Vlad from the royal revenues on 21September, but Vlad left