Serbian kings Stefan Radoslav and Stefan Vladislav, who were Saint Sava's nephews, significantly endowed the monastery with new land possessions and proceeds. In order to effectively deal with consequences of the Crusader Latin plunder, King Uroš the Great constructed a large fortification surrounding the monastery with the protective tower named after the Transfiguration of Christ. King Dragutin also expanded proceeds to the monastery and land or metochion income. He participated in improving and reinforcing defensive fortifications. Following the end of the Latin Occupation of this part of Byzantium, a new wave of raids hit the monastic republic. In the early 14th century, pirate mercenaries of the Catalan Grand Company repeatedly raided the Holy Mountain, while looting and sacking numerous monasteries, stealing treasures and Christian relics, and terrorizing monks. Of the 300 monasteries and monastic communities on Athos, Hilandar was among only 35 that survived the violence of the first decade of the 14th century. The monastery owes this fortune to its very experienced and skillful deputy hegumen at the time Danilo, who later became the Serbian Archbishop Danilo II.