Skanderbeg educated at Enderun School
Ottoman service: 1423 to 1443
Skanderbeg was sent as a hostage to the Ottoman court in Adrianople (Edirne) in 1415, and again in 1423. It is assumed that he remained at Murad II's court as iç oğlan for a maximum of three years, where he received military training at Enderun.The earliest existing record of George's name is the First Act of Hilandar from 1426, when Gjon (John) Kastrioti and his four sons donated the right to the proceeds from taxes collected from two villages in Macedonia (in modern Mavrovo and Rostuša, North Macedonia) to the Serbian monastery of Hilandar. Afterwards, between 1426 and 1431, Gjon Kastrioti and his sons, with the exception of Stanisha, purchased four adelphates (rights to reside on monastic territory and receive subsidies from monastic resources) to the Saint George tower and to some property within the monastery as stated in the Second Act of Hilandar. The area which the Katrioti family had donated to was referred to by the monks in Hilandar as the Arbanashki pirg or Albanian tower. Reposh Kastrioti is listed as dux illyricus or Duke of Illyria in Hilandar.After graduating from Enderun, the sultan granted Skanderbeg control over one timar (land grant) which was near the territories controlled by his father. His father was concerned that the sultan might order Skanderbeg to occupy his territory and informed Venice about this in April 1428. In the same year Gjon had to seek forgiveness from the Venetian Senate because Skanderbeg participated in Ottoman military campaigns against Christians. In 1430, Gjon was defeated in battle by the Ottoman governor of Skopje, Ishak Bey, and as a result, his territorial possessions were extremely reduced. Later that year, Skanderbeg continued fighting for Murad II in his expeditions, and gained the title of sipahi. Several scholars have assumed that Skanderbeg was given a fiefdom in Nikopol in northern Bulgaria, because a certain "Iskander bey" is mentioned in a 1430 document holding fiefs there. Although Skanderbeg was summoned home by his relatives when Gjergj Arianiti and Andrew Thopia along with other chiefs from the region between Vlorë and Shkodër organized the Albanian revolt of 1432–1436, he did nothing, remaining loyal to the sultan.
studied at graduated from attended enrolled at completed education at