Humbert was elected as Master General of the Dominican Order in 1254. His first achievement was the re-organization (and consequent standardization) of the Order's
liturgy. A new edition of the Order's
Constitutions was prepared, and measures were taken to improve discipline in the Order's houses. He issued new Constitutions for all nuns associated with the Dominican Order, based on those he himself had drawn up while serving as Provincial of France. He instituted the formal collection of information of two of the Order's members,
Dominic, the founder, and the martyred
Peter of Verona, with the intention of seeking their
canonization. As a result of this search for information, Friar Gerald de Frachet produced his
Vitae fratrum (
Lives of the Brothers). Humbert was a great lover of languages, and encouraged linguistic studies among the Dominicans, primarily Arabic, because of the missionary work friars were pursuing amongst those led astray or forced to convert by
Muslims in the Middle East. In 1255, he was called to adjudicate a dispute on the Constitutions of the
Carthusian monks. In 1256, he became the
godfather of one of the children of King
Louis IX of France; and, in 1258, the same king asked for his advice regarding the settlement of a dispute between various noble families. Humbert further encouraged the missionary activities of the friars, and schools to teach
Oriental languages were established in Spain. In governing, he demonstrated both indulgence and severity when either was required, and he combined a broad outlook with a genius for detail. Under his rule, the Order flourished in Italy, Germany, Spain, France, and England. Humbert sent missionaries to the Greeks, Hungarians, Saracens, Armenians, Syrians, Ethiopians, and Tartars. He regulated the liturgy of the
Divine Office, determined the suffrages for the dead, commanded the history of the Order be recorded, and even issued minute decrees concerning the election of superiors, the reading of the Constitutions at meals, the transfer of friars from one house to another and other pertinent regulations. Opposition to the presence of both
Dominicans and
Franciscans at the
University of Paris during the mid-1250s led to his issuing a joint
encyclical with the Franciscan
Minister General, urging that the two Orders - often in bitter dispute - should work together for their survival and the maintenance of their university chairs. Humbert resigned his position as Master of the Order in 1263 at the
General Chapter held in
London, probably on account of his failing health. ==Writings==