Gregory was a supporter of the mendicant orders which he saw as an excellent means for counteracting by voluntary poverty the love of luxury and splendour which was possessing many ecclesiastics. He was a friend of Saint Dominic as well as Clare of Assisi. On 17 January 1235, he approved the Order of Our Lady of Mercy for the redemption of captives. He appointed ten cardinals and canonized Saints Elisabeth of Hungary, Dominic, Anthony of Padua, and Francis of Assisi, of whom he had been a personal friend and early patron. He transformed a chapel to Our Lady in the church of Santa Maria del Popolo in Rome.