Saint Richard the Lionheart of the House of Plantagenet ruled the Luthori as Rzeczpospolita King, Rzeczpospolita Emperor and finally Holy Luthori Emperor from February 2143 until the Act of Succession 2442, finally accepted he wasn't coming back from the crusades, declared him a saint, and named a successor. With a reign spanning 299 years he was the longest reigning monarch in Terra.