Complex sentence: Gregory promoted the Church in northern Europe, such as the missions of Saint Boniface in Germany and Willibald in Bohemia, and bestowed palliums on Egbert of York and Tatwine, Archbishop of Canterbury.
Split into simpler sentences: Gregory promoted the Church in northern Europe, such as the missions of Saint Boniface in Germany and Willibald in Bohemia. He also bestowed palliums on Egbert of York and Tatwine, Archbishop of Canterbury.