Complex sentence: According to Gregory of Tours, sole power of the Empire at this point was assumed by Sophia, a niece of Theodora and Empress consort of Justin II. Evagrius Scholasticus reports that Sophia managed to conclude a three-year truce with Khosrau by her own.
Split into simpler sentences: According to Gregory of Tours, sole power of the Empire at this point was assumed by Sophia. Sophia was a niece of Theodora and Empress consort of Justin II. Evagrius Scholasticus reports that Sophia managed to conclude a three-year truce with Khosrau by her own.