Complex sentence: He is a member of the formerly sovereign princely House of Schönborn, several members of which held high offices of the Holy Roman Empire and the Catholic Church, and descends from many prominent families of Bohemia as well as the House of Savoy-Carignano.
Split into simpler sentences: He is a member of the formerly sovereign princely House of Schönborn, several members of which held high offices of the Holy Roman Empire and the Catholic Church. He descends from many prominent families of Bohemia as well as the House of Savoy-Carignano.