sentences:  Since the 9th century, the family counted five Counts Palatine of Lotharingia, several Dukes of Westphalia, Bavaria, Carinthia and Swabia, seven Archbishops of Cologne, one Prince-Bishop of Speyer, more than ten bishops in the Holy Roman Empire, and at least two saints of the Catholic Church (Saint Richenza, celebrated on 21 March, and Saint Engelbert of Cologne, celebrated on 7 November).The territorial authority of the family, counts of Berg since 1077, counts of Altena and Isenberg, then counts of Limburg since 1246, was significantly reduced following the opposition of Frederick II, Count of Isenberg to the aggression of his cousin, the Archbishop of Cologne, Engelbert II of Berg, leading to the murder of the latter.A cadet branch, the Counts van den Marck, later rose in importance as dukes of Cleves, Jülich and Berg, dukes of Nevers and Bouillon, counts of Schleiden, etc.