In 1302, expanding French royal power led to a general assembly consisting of the chief lords, both lay and ecclesiastical, and the representatives of the principal privileged towns, which were like distinct lordships. Certain precedents paved the way for this institution: representatives of principal towns had several times been convoked by the king, and under Philip III there had been assemblies of nobles and ecclesiastics in which the two orders deliberated separately. It was the dispute between Philip the Fair and Pope Boniface VIII which led to the States-General of 1302; the king of France desired that, in addition to the Great Officers of the Crown of France, he receive the counsel from the three estates in this serious crisis. The letters summoning the assembly of 1302 are published by M. Georges Picot in his collection of "Documents inédits pour servir à l'histoire de France". During the same reign they were subsequently assembled several times to give him aid by granting subsidies. Over time subsidies came to be the most frequent motive for their convocation.