The Puerta del Perdón, located in the south transept arm of the royal monastery church of San Isidoro in León, has been considered by traditional historiography like a fundamental work of the Romanesque art. Its sculpture reflects the sources that could have been utilized by the artists who made that work. For example, it has been valued the role played by some artistic productions originated in early christian workshops of the Late Antiquity, and the ideological impact of the Gregorian Reform. All these things allow the investigation of the iconographic connections between the portal and some hispanic centres of that time like the Cathedral of Santiago de Compostela or the church of Santo Domingo de Silos, and like other european examples like the basilica of Saint Sernin de Toulouse or the burgundian abbey of Cluny
