Ladislaus was crowned king of Bohemia in Prague on 28 October 1453, which put an end to the long interregnum. Ulrich Eytzinger, John Hunyadi, and George Poděbrady, who all were present at Ladislaus' coronation, signed a treaty. Ladislaus stayed in Prague during the next twelve months. George Poděbrady hindered him from consulting with his Austrian and Hungarian advisors, and even the royal seal was taken from Ladislaus. At the next Diet of Hungary, Bishop John Vitéz submitted a proposal on the king's behalf to the Estates, demanding the centralization of the administration of royal revenues, but the Diet refused the proposal, which would have limited John Hunyadi's authority. According to the document prepared by the bishop on this occasion, Ladislaus' cash revenues amounted to 216,000 florins. Historian János M. Bak writes that that amount would have only covered about 85% of the expenses of a military expedition against the Ottoman Turks, who had captured Constantinople and planned to invade Hungary.