on monetary income, its powers are gradually extended to the whole field of financial administration and the chief executive officer rises to the rank of a national office of a purely financial nature, according to Bálint Hóman. Denis participated in the Fifth Crusade under the command of Andrew II between summer 1217 and early 1218, along with several Hungarian magnates and prelates, for instance Ladislaus Kán and Demetrius Csák. Crossing the Jordan River, Denis led the Hungarian contingent within the crusade army in order to besiege and capture the fortress of Al-Adil I at Mount Tabor in November–December 1217, while Andrew II stayed away from the military conflict and collected Christian relics. Thereafter, Denis and his Hungarian troops participated in the skirmishes at the Anti-Lebanon Mountains against the Ayyubids at the turn of 1217 and 1218. In his contemporary work, Arab historian Abu Shama mistakenly referred to Denis as Andrew's nephew ("the son of the king's sister"), while the Estoire d'Eracles described him as a "rich man". Andrew II decided to return Hungary at the very beginning of 1218, and Denis and the majority of the Hungarian contingent accompanied him. When they returned to Hungary, Andrew was in massive debt because of his crusade, which forced him to impose extraordinarily high taxes and debase coinage, which measures Denis directed. The continuous employment of Jews and Muslims to administer royal revenues also caused a discord between Andrew and the Holy See starting in the early 1220s. The royal servants – who were landowners directly subject to the monarch's power and obliged to fight in the royal army – assembled, forcing Andrew to dismiss Julius Kán, Denis and his other officials in the first half of 1222. Andrew was also forced to issue a royal charter, the Golden Bull of 1222, which summarized the liberties of the royal servants. Few months later, the Golden Bull movement failed and Andrew restored his confidants to their formerly deprived positions, including Denis, already in the second half of the year. Denis retained his dignity of Master of the treasury until 1224. After Duke Coloman and his wife settled in Szepes (Spiš) region in 1222, near the Hungarian–Galician border, Andrew entrusted Denis to support him politically (it is possible he still held the dignity of ispán in the county, but there is no source for that). There, Denis had plausibly received estates in the region, Vidernik