Complex sentence: Shortly after his conversion, he was killed by Ricberht, a pagan noble, and so became the first English king to suffer death as a consequence of his Christian faith, though the motive for his assassination was probably political as well as religious.
Split into simpler sentences: Shortly after his conversion, he was killed by Ricberht, a pagan noble, and so became the first English king to suffer death as a consequence of his Christian faith. The motive for his assassination was probably political as well as religious.