Complex sentence: Although there is very little factual detail about the life of Saint Teilo, the fact that he was highly respected in his lifetime and revered after his death is shown by the forty-five places dedicated to him, some as far afield as Brittany.
Split into simpler sentences: Although there is very little factual detail about the life of Saint Teilo he was highly respected in his lifetime and revered after his death. In fact forty-five places are dedicated to Saint Teilo, some as far afield as Brittany.