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Wollo (Amharic: ወሎ) was a historical province of northern Ethiopia. During the Middle Ages this province name was Amhara or Bete Amhara and it was the centre of the Amhara Solomonic emperors prior to the Oromo invasion into the province which resulted in many of the places names (including the name of the province itself) to be changed from its original names in Amharic and Ge’ez. Bete Amhara had an illustrious place in Ethiopian political and cultural history. It was the center of the Solomonic Dynasty established by Emperor Yekuno Amlak around Lake Hayq in 1270, the original center of Amhara people, whose territorial reach extended from Lake Hayq and the Beshillo River in the north, the Afar and Argobba lowlands in the east, the Abbay River in the West, and the Awash River just south of modern Addis Ababa.
The original Wollo/Bete Amhara province was only on the area of modern day South Wollo. But in the 1940s, under Emperor Haile Selassie, administration changes were made and provinces such as Lasta, Raya (Angot) and parts of Afar were incorporated into Wollo.