Final answer:
The Zagwe dynasty replaced the Aksum in Ethiopia around A.D. 600, notable for the churches of Lalibela and its rule until the Early Solomonic period began in 1270 CE.
Step-by-step explanation:
The dynasty that replaced the Aksum in Ethiopia in A.D. 600 was the Zagwe dynasty. The Zagwe period, dating from around 1140 to 1270 CE, followed the power shift to the south to the Lasta region. With their capital at Adeffa, the Zagwe dynasty ruled a realm that included modern Eritrea to northern and central Ethiopia. Some of the most remarkable testaments to the artistic achievements during this period are the churches of Lalibela, which were named after the king credited with their construction.
The transformation from the Aksumite rulers to the Zagwe dynasty marked a significant period in the history of Ethiopia, with the later overthrow of the Zagwe by the Early Solomonic period starting in 1270 CE, initiated by Yekunno Amlak who claimed descent from the Aksumite kings.