Equally unsuccessful were the attempts of the Franciscan Pope Sixtus IV but by this very fact lost the favor of the Observants and failed in his plans for reunion .
IV bestowed a vast number of privileges on both the original mendicant orders .
Equally unsuccessful were the attempts of the Franciscan Pope Sixtus IV , who bestowed a vast number of privileges on both the original mendicant orders , but by this very fact lost the favor of the Observants and failed in his plans for reunion .