In 1229, a denial of justice by the queen led to suspension of the courses. The pope intervened with a Bull that began with lavish praise of the university: "Paris", said Gregory IX, "mother of the sciences, is another Cariath-Sepher, city of letters". He commissioned the Bishops of Le Mans and Senlis and the Archdeacon of Châlons to negotiate with the French Court for the restoration of the university, but by the end of 1230 they had accomplished nothing. Gregory IX then addressed a Bull of 1231 to the masters and scholars of Paris. Not only did he settle the dispute, he empowered the university to frame statutes concerning the discipline of the schools, the method of instruction, the defence of theses, the costume of the professors, and the obsequies of masters and students (expanding upon Robert de Courçon's statutes). Most importantly, the pope granted the university the right to suspend its courses, if justice were denied it, until it should receive full satisfaction.