At the base, between these huge, grave sentinels, stands the magnificent old portico with the modern facing of the main body of the church above it. This screen of later days, built after the removal of a hideously out-of-keeping Renaissance front, is contained within two buttresses which meet the great flying ones. In fact, looking down the stone gorge between these buttresses and the towers, one sees a mass of pushing and propping flying buttresses springing in double rows above the roof of the side aisles towards the clerestories of the nave. The screen itself contains, immediately above the portico, an arcade of four subdivided arches, corresponding to the triforium, and above it a gorgeous rose window. It is the best type of late thirteenth or early fourteenth-century wheel of radial system, very similar in design to the western wheel of Notre Dame de Paris and the great western one of Burgos. Springing suddenly into being in all its developed perfection, it can only be regarded as a direct importation from the Isle de France. The ribs of the outer circle are twice as many as those of the inner, thus dividing the glass surfaces into approximately equal breadth of fields. This and the rose of the southern transept are similar, and both are copies of the original one still extant in the north transept. A fine cornice and open-work gallery surmount the composition, flanked by crocketed turrets and crowned in the centre by a pediment injurious in effect and of Italian Renaissance inspiration. The gable field is broken by a smaller wheel, and in an ogival niche are statues of the Annunciation. The portico is the most truly splendid part of the Cathedral. Erected at the end of the thirteenth or beginning of the fourteenth century, much of its Gothic sculpture is unsurpassed in Spain. A perfect museum of art and a history in magnificent carving. The composition as a whole recalls again unquestionably Chartres. It consists of three recessed arches hooding with deep splays the three doorways which lead into nave and side aisles. Between the major arches are two smaller, extremely pointed ones, the most northerly of which encases an ancient columnar shaft decorated with the arms of Leon and bearing the inscription, "locus appellationis." Beneath it court was long held and justice administered by the rulers of Leon during the Middle Ages.