The Psalm Headings remain one of the most difficult and puzzling pieces of the Hebrew Bible. The present study looks at how these titles were treated in the East Syriac traditions. This volume gives a history of research and presents a new critical edition based on previously unpublished manuscripts. The Psalm headings in the East Syriac tradition reflect the exegesis of the Antiochene school, especially Diodore of Tarsus and Theodore of Mopsuestia. The headings contain a summary of Theodore's exegesis which had an important influence on the work of Syriac interpreters such as Ishodad of Merv and Bar Hebraeus.