Although the Hungarians, or Magyars, seem to have used their own alphabet before adopting Christianity in the 11th century, most information of their early history was recorded by Muslim, Byzantine and Western European authors. For instance, the "Annals of Fulda", Regino of Prüm's "Chronicon", and Emperor Constantine VII's "De administrando imperio" contain contemporaneous or nearly contemporaneous reports of their conquest of the Carpathian Basin at the turn of the 9th and 10th centuries. Among the Hungarians, oral tradition—songs and ballads—preserved the memory of the most important historical events. The "Illuminated Chronicle" explicitly stated that the "seven captains" who led the Hungarians during the Conquest "composed lays about themselves and sang them among themselves in order to win worldly renown and to publish their names abroad, so that their posterity might be able to boast and brag to neighbours and friends when these songs were heard".