If the list is reliable, his income surpassed the revenues of the contemporaneous Kings of France and England, but the reliability of the list has been questioned by many historians, including Pál Engel.
Jika daftarnya dapat diandalkan, pendapatannya melampaui pendapatan Raja Prancis dan Inggris kontemporer, namun keandalan daftar tersebut diragukan oleh banyak sejarawan, termasuk Pál Engel.