Original sentence: The Franciscan Custos of the Holy Land (The Grand Masters of the Order of the Holy Sepulchre) held the title from 1342 to 1830 under the Papal bull Gratiam agimus by Pope Clement VI (unless someone was specifically appointed in the honorary office)
Edited sentence: The Franciscan Custodian of the Holy Land held the title from 1342 to 1830 under the Papal bull Gratiam agimus by Pope Clement VI (unless someone was specifically appointed in the honorary office).The bull declared the Franciscans as the official custodians of the Holy Places in the name of the Catholic Church