What is "sebeos"

Sebeos was a 7th-century Armenian bishop and historian.

Little is known about the author, though a signature on the resolution of the Ecclesiastical Council of Dvin reads 'Bishop Sebeos of Bagratunis.' His writings are valuable as one of the few intact surviving sources that chronicle sixth century Armenia and its surrounding territories. The history of Sebeos contains detailed descriptions from the period of Sassanid supremacy in Armenia up to the Islamic conquest in 661. His history was published for the first time in 1851 in Istanbul.