Complex sentence: Leading four hundred men and armed with a pike, he entered the Papal tribunal in Campidoglio and beheaded Judge Benincasa, then put the head on his pike and brought that back to Radicofani, where he exposed the scalp on the tower for a long time.
Split into simpler sentences: Leading four hundred men and armed with a pike, he entered the Papal tribunal in Campidoglio and beheaded Judge Benincasa. He impaled the head on his pike and brought it back to Radicofani, where he exposed the scalp on the tower for a long time.