Complex sentence: Liutprand, King of the Lombards, his father's Ansprando successor, ascended the throne in 712, was a Catholic and proved himself builder and restorer of churches in Pavia and elsewhere.
Split into simpler sentences: Liutprand, King of the Lombards, his father's Ansprando successor, ascended the throne in 712. He was a Catholic and proved himself builder and restorer of churches in Pavia and elsewhere.