Complex sentence: Christian mythology became a linchpin of medieval Ethiopian historiography due to works such as the "Kebra Nagast", reinforcing the claims of Ethiopia's dynastic rulers that they were descendants of Solomon, the legendary king of Israel.
Split into simpler sentences: Christian mythology became a linchpin of medieval Ethiopian historiography due to works such as the "Kebra Nagast". This reinforced genealogical traditions of Ethiopia's dynastic rulers, which asserted that they were descendants of Solomon, the legendary king of Israel.