Matteo Rosso Orsini was a member of the Third Order of S. Francis (Tertiary): Richard Sternfeld, Der Kardinal Johann Gaëtan Orsini, p. 2. It was Giovanni Gaetano's father, also called Matteo Rosso Orsini ('Il Grande'), who, as Senator of Rome, locked the Cardinals up in a sort of proto-conclave in August, 1241. Ryccardus de S. Germano, Chronica.