Complex sentence: The abbey at Battle has been known for centuries as "Battle Abbey", but it and the abbey church were initially dedicated to the Saint Martin, sometimes known as "the Apostle of the Gauls," and named in his honour.
Split into simpler sentences: The abbey at Battle has been known for centuries as "Battle Abbey". It and the abbey church were initially dedicated to Saint Martin, sometimes known as "the Apostle of the Gauls", and named in his honour.