According to Manoel De Almeida Semien was bordered on the north-east and north by Tigray and Tselemt, on the east and south by Abergele, and on the west by Wegera.
[2] The first mention of the Simien Mountains comes from the Monumentum Adulitanum, an Aksumite inscription recorded by Cosmas Indicopleustes in the sixth century AD.
[3] There is also a note in Cosmas Indicopleustes' work which states that the Simien Mountains was a place of exile for subjects condemned to banishment by the Aksumite king.
[10][11][12] Succeeding his father Gebre, Dejazmach Haile Maryam Gebre reigned for over a decade before making the way for his son Dejazmach Wube Haile Maryam, who significantly expanded the territory of Semien by conquering the provinces of Tsegede, Welkait and eventually went east of the Tekeze to rule Tigray Province and modern day Eritrea.
In his early 19th century writings, traveller Henry Salt noted that coarse carpets were made in Semien, from the wool and hair of sheep and goats.