Aisles, Ambulatory and Girola. Chapel of the Constable. Sacristy. High cloister. Cloistered chapel of Saint Jerome. Chapel of the Corpus Christi. Chapterhouse. Chapel of Saint Catherine. Chapel of Saint John the Baptist and Saint James. Narthex, Gate of Saint Mary. Gate of the Coronería. Gate of the Pellejería. Low cloister. Gothic foundation and works in the 13th and 14th centuries The first stone of the new cathedral was laid on June 20, 1221 in the presence of the promoters of the cathedral: the king Ferdinand III of Castile "the Saint" and Bishop Maurice of Burgos, bishop of the Burgalese diocese since 1213. Pope Honorius III granted an indulgence to all contributors to the construction. Presumably, the first master builder was an anonymous French architect - although some researchers posit the name of the canon Johan de Champagne, cited in a document of 1227 -, most likely brought to Burgos by bishop Maurice himself, after his trip to France and Germany to arrange the marriage of the monarch with Elisabeth of Swabia. The bridal ceremony was held precisely in the old Romanesque cathedral. The cathedral was located just at the point where the slope of the hill, presided over by the Castle of Burgos, begins to rise. The construction was initiated at the front and at the presbytery, where the founding bishop was buried. His remains were later transferred to the center of the chapter choir. By 1240 the so-called Master Enrique became the master-architect of the works. He would also be responsible for the construction of the Cathedral of León and was inspired definitely by the Cathedral of Reims, with whose facade the gable of the Cathedral of Burgos shows great similarities. The work progressed very quickly and in 1238, year of the death of the founder prelate, buried in the presbytery, the front and much of the transept and the naves were already almost completed. The consecration of the cathedral took place in 1260, although ecclesiastical services were already held from 1230. The chapels of the aisles were completed between the second half of the 13th century and early 14th century and a new cloister was built. Master Enrique died in Burgos in 1277 and was succeeded by Master Juan Pérez. He was succeeded later by Aparicio Pérez, active in 1327, Pedro Sánchez de Molina and Martín Fernández, who died in 1396 and 1418 respectively. Expansions and reforms in