I'm glad to see here two of my favorite historical characters, Bismarck and Richelieu. Though can you really count Cardinal Richelieu as one? Monarchist in excellence, but surely his title was ecclesiastical, not monarchical.
Wow- yet another coincidence, I was just talking with someone about Empress Zita today.
Cardinal Richelieu was a "Prince of the Church" by virtue of his office and a relative of a great many royals (then and moreso since). Matterhorn, you better be careful, you start thinking like me and you will get to a very scary place!
Cardinal Richelieu was also a Duke, a hereditary one, by virtue of his birth in addition to being a cardinal of the Roman Catholic Church and a prelate of France.