Complex sentence: In 1617 the Friary was occupied by the Protestant Bishop of Raphoe, The Rt. Rev. Dr. Andrew Knox, Bishop of Raphoe who turned it into a fortified house in anticipation of a possible French invasion during the Napoleonic Wars.
Split into simpler sentences: In 1617 the Friary was occupied by the Protestant Bishop of Raphoe, The Rt. Rev. Dr. Andrew Knox. A subsequent Bishop of Raphoe turned it into a fortified house in anticipation of a possible French invasion during the Napoleonic Wars.