A good-conduct guide for princes and rulers that focuses on the government of self, the family and the civil authorities proved particularly topical at a New York auction on October 17.
It was a 1480 edition printed in the Catalan language.
Written in the 13th century by the Augustinian philosopher and theologian Edigio Romana Colonna, Archbishop of Bourges (also known as Aegidius Romanus), Lo libre del regiment dels princeps was first printed, in Latin, in 1473.