By the first half of the twelfth century, the center of power of the Christian Kingdom had shifted even further south, to the Lasta region (a historic district in north-central Ethiopia). From their capital Adeffa, members of the Zagwe dynasty (from whom this period takes its name), ruled over a realm which stretched from much of modern Eritrea to northern and central Ethiopia. While limited evidence about their capital exists, the churches of Lalibela—a town which takes its name from the Zagwe ruler credited with its founding—stand as a testament to the artistic achievements of this period.
The political center of Ethiopia seems to have gradually shifted to the southern and eastern parts of the Tigray region (the northernmost of the nine regions of Ethiopia) in the Post-Aksumite period. A few churches in these areas have been tentatively attributed to this period, but subsequent adaptations combined with the inability to obtain permissions to conduct archaeological surveys make dating difficult. It seems likely that churches continued to be built as well as hewn (cut) out of rock. A group of funerary hypogea (underground chambers) in the Hawzien plain (in northern Ethiopia) may have been transformed into churches during the post-Aksumite period. This could be the case for churches such as Abreha-we-Atsbeha (below) and Tcherqos Wukro (the paintings in these churches probably date from a later period). According to local oral traditions, a small number of iron crosses date to the Aksumite or Post-Aksumite periods, but the absence of reliable dating methods and the fact that such crosses were produced at least until the sixteenth century, makes it extremely difficult to verify these claims.
A number of factors contributed to the gradual impoverishment and decline of the Aksumite kingdom. The Arab expansion into Northern Africa cut off the kingdom’s access to the Red-Sea waterway (and to the markets which could be reached through it and on which a large part of the kingdom’s prosperity had been based). There is also evidence to suggest that some of the kingdom’s natural resources, such as gold and ivory, had been depleted. Very little is known about this phase of Ethiopian history and scholars even disagree on the dates of its beginning and end.