Complex sentence: The town was first mentioned in the Domesday Book of 1086 as "Neuport", which is Old English meaning "New Market Town", but by that time the old Anglo-Saxon town was dominated by the Norman invaders.
Split into simpler sentences: The town was first mentioned in the Domesday Book of 1086 as "Neuport", which is Old English meaning "New Market Town". By that time the old Anglo-Saxon town was dominated by the Norman invaders.