Complex sentence: Rowland FitzEustace, 1st Baron Portlester (died 19 December 1496) was an Irish peer, statesman and judge, and one of the dominant political figures in late fifteenth-century Ireland.
Split into simpler sentences: Rowland FitzEustace, 1st Baron Portlester (died 19 December 1496) was an Irish peer, statesman and judge. He was one of the dominant political figures in late fifteenth-century Ireland.