Complex sentence: He was frequently at the English Court, (to the extent that he was accused of neglecting his official duties) and participated in the christening of the future Queen Mary I and the ceremony by which Wolsey received his cardinal's hat.
Split into simpler sentences: He was frequently at the English Court, (to the extent that he was accused of neglecting his official duties). He participated in the christening of the future Queen Mary I and the ceremony by which Wolsey received his cardinal's hat.