Their activities spread Christianity beyond "a narrow corridor between Adulis and Aksum along the caravan routes."[2] Besides converting the local inhabitants to Christianity, they also founded a number of monastic houses that followed the rule of Saint Pachomius: Abba Aftse founded the monastery at Yeha; Abba Alef the northernmost establishment at Bi'isa on the south bank of the Mareb River; the foundation of the important monastery of Debre Damo is attributed to Abba Aragawi; Abbas Liqanos and Pantelewon are credited with establishing Pentalewon Monastery in Axum; Abba Garima founded Abba Garima Monastery north of Adwa; Abba Guba the one at Madara; Abba Tsahma one at Sedenya; and Abba Yem’ata founded the southernmost one of the group in the Gar'alta, noted for its Abuna Yemata Guh church named after him.[3]