This thesis focuses on the la te medieval 14th c. Mss. of GadHi Qawsos. Thernreason why the researcher chose this giidl as his research subject those targetsrnon this gadl, and also it is not well known comparing with the Ms. of GadlarnTakla Haymanot and also it had not been deeply studied by the scholars. Thernresearcher introduces the Mss. of Gadla Qawsos and assesses the activities ofrnthe saint towards the expansion of Christianity and monasticism.rnThe researcher mainly describes the textual tradition of five Mss. of GadlarnQawsos that are found from Garr Qddddst Sdllase monastery, Bayyo AbunarnQawsos church, N ~ bge St. Mary and Abuna Qawsos monastery, and from thernNational Archives and Library Agency and classify the stemma codicum of thernMss. depend on their internal evidences or they had shared conjunctive errors.rnFinally, the researcher analyzes the biography of Abuna Qawsos depend on therngadl and philological analysis of the text.