Thomas Preljubović (; ) was ruler of the Despotate of Epirus in Ioannina from 1366 to his death on December 23, 1384. He also held the title of Albanian-slayer (Greek: Αλβανοκτόνος/Αλβανιτόκτονος) after torturing Albanian prisoners in order to terrify his enemies. Toma is remembered for presenting several outstanding icons to the monastery of the Transfiguration at Meteora and in Cuena, in Spain. He also made gifts to the Athonite monasteries of Great Lavra, Vatopedi and Hilandar. Toma Preljubović was particularly attached to his namesake the apostle Thomas. In one of the icons at Meteora, a composition of Doubting Thomas includes Toma's wife, Maria-Angelina, among the apostles. It is not unlikely that he was responsible for having the frescoes painted in the Hilandar parekklesion of the Holy Archangels, where in the lower zone, the apostle Thomas and the warrior St. Procopius occupy a prominent place. Ancestors Thomas was the son of caesar Gregorios Preljub (), the Serbian governor of Thessaly, who died in late 1355 or early 1356. His mother Irene Nemanjić was a daughter of Stephen Uroš IV Dušan of Serbia and Helena of Bulgaria. Life After the violent death of his father, Thomas' claim to Thessaly was asserted by his mother Irene, but they were forced to flee to Serbia by the advance of Nikephoros II Orsini in 1356. Here, Irene married Radoslav Hlapen, the ruler of Vodena, who took Thomas under his wing. During the absence of Thessaly's new ruler, Simeon Uroš Palaiologos, in the Despotate of Epirus in 1359–1360, Hlapen invaded Thessaly, attempting to win it for his stepson. Although Simeon Uroš managed to contain the invasion, he was forced to cede Kastoria to Thomas and to marry him to his daughter Maria. Over the next several years, Simeon Uroš recognized that he could not assert effective authority over most of Epirus and delegated power in Arta and Angelokastron to local Albanian chieftains. In 1366 the citizens of Ioannina, the last major fortress to remain under Simeon Uroš's control, sent him a petition to appoint a governor who could protect them from the raids of Albanian clansmen. Simeon Uroš responded by designating Thomas as his governor and forwarding the Ioanninan and Vagenetian (Thesprotian) embassy to him. Thomas entered Ioannina sometime in 1366 or 1367. Thomas' reign in Epirus is reflected in most detail in the so-called Chronicle of Ioannina, which is deeply prejudiced and hostile against Preljubović.