Note 62 — Chapter III · PALENCIA—VALLADOLID.
Reading edition
The first stone of the cathedral was laid on the 1st of June, 1321, by Cardinal Arnoldo, legate of Juan XXII., assisted by Juan II., Bishop of Palencia, and six other bishops, among whom was the Bishop of Bayonne; “and the first prebendary who had charge of the works (‘obrero’) in this holy church was Juan Perez de Aceves, Canon and Prior of Usillos, who assisted in laying the first stone with the legate and the bishops.”—G. G. Dávila, Teatro Eccl. ii. 159.