Matthew of Edessa was an Armenian historian in the 12th century from the city of Edessa. Matthew was the superior abbot of Karmir Vank', near the town of Kaysun, east of Marash (Germanicia), the former seat of Baldwin of Boulogne. He relates much about the Bagratuni Kingdom of Armenia, the early Crusades, and the battles between Byzantines and Arabs for the possession of parts of northern Syria and eastern Asia Minor. Byzantine authors such as Joannes Zonaras and Anna Comnena were well versed in their particular spheres, but uninformed regarding Edessa and neighboring lands which are treated by Matthew.