[4] In his new offices, Thomas immediately came into conflict with Honorius III when, in accordance with a strict implementation of the resolutions of Capua, which provided for a revocation of privileges, he demanded fees and charges for the imperial treasury from the city of Benevento.
[7] In July 1227, Thomas and Hermann of Salza, master of the Teutonic Knights, led an advance command of the Sixth Crusade to the Holy Land.
In the spring of 1228 he wrote a letter to the imperial court in which he reported on the death of al-Mu'azzam, al-Kamil's brother who ruled Damascus, which prompted the recently excommunicated Frederick to begin his crusade.
[9] In 1242, Thomas was sent a second time to the Holy Land to act there as deputy to the emperor and from April 1243 for Conrad II of Jerusalem in his role as regent.
As a result, the government established by Conrad II could not be recognized as legitimate, and the council installed Alice of Cyprus and her husband Raoul of Nesle.
Thomas returned to Italy just prior to the loss of took the port city of Tyre, the last base of the Hohenstaufen rule in the Holy Land.