But in the 1940s, under Emperor Haile Selassie, administration changes were made and provinces such as Lasta, Angot (now known as Raya), and parts of Afar lands were incorporated into Wollo.
The people of Amhara and Zagwe Provinces (today's Wollo) were the strongest adherents of Christianity and both believed in Israelite Semitic Biblical Ancestry Zagwe claimed lineage from Moses while the Solomonids claimed lineage from Solomon, and the beliefs and customs of the Church from an essential part of tradition and culture to this area.
In the medieval era, the Tsahife Lam (ጻሕፈ ላም), governor of the Bete Amhara province, was the most senior military officer next to the Emperor.
Along with that, the Jantirar of Ambassel (the center of Bete Amhara and lordship of Yekuno Amlak himself prior to his ascension as Emperor of Ethiopia), was tasked with protecting Amba Geshen.
Devout Christians hope to live their last years as monks or nuns, and many take monastic vows during old age.
The Monasteries spread along with the Ethiopian Empire and Tekle-Haymanot (1215-1313) was trained at Hayq by Iyasus Mo'a and started the important Monastic community of Debre Asbo in Shewa Amhara Debre Libanos, Abune Hirute Amlak was also trained in this Monastery by Iyasus Mo'a and started the imperative Monastic community of Daga Estifanos in Lake Tsana and Aba Georgis Zegasecha trained and started the Monastic community of Gasecha.
For example, from the Monastery of Hayq Estifanos the well-known Saints and Christian kings had learnt Church education.
So, his son Lebna Dengel finished it after 12 years by constructing a great Church and more beautiful than his father.
Among them, the Portuguese priest and historian writer, Francisco Alvarez was the one who recorded the ceremonies of the Church inauguration at that time.
[citation needed] On the other hand, the historical writer of Ahmad Gragn, Arab Faqeh, recorded about its architectural design before the destruction of the Church.
[8] The Oromo clans that invaded Wollo in the late 16th century adopted Islam during their expansion process.
Emperor Tekle Giyorgis I decided to punish the Oromo over the atrocities that they committed against the Christian population of Bete Amhara but failed to completely operate it due to internal problems that he faced.
Whereas part of them remain isolated and clustered in highland areas of wollo; especially in Warra Himano and Ambassel.