But these are subjects slightly unsuited to the interior of the cathedral, of our presence in which we are evidently forgetful. The Mozarabic Chapel, founded by Cardinal Ximenes de Cisneros, is situated under the southern tower, and contains a Virgin and Child executed in Mosaic, and a curious old fresco painting, representing the battle of Oran, at which the Cardinal was victorious over the Arabs. This chapel is set apart for the performance of the Mozarabic ritual, still retained by a portion of the population of Toledo, and the exercise of which was continued in several churches, until the closing of some of them at the recent revolution. The Arab conquerors of Spain exercised towards the religion of the country, the most complete and liberal tolerance. All who preferred remaining in the conquered towns to flight and exile, were allowed to retain a sufficient number of places of worship for the free exercise of their religion. On the subsequent introduction of the Italian missal, those who retained the ancient gothic forms were called Mozarabes (mixti Arabes, according to some, from their service being the same as that in use during the co-existence together of the two creeds). A more probable origin is attributed to the expression by some antiquaries, who derive it from Muza, the name of the Moorish general. The mass of the Christians who had taken refuge in the Asturias, applied the term to their brethren, who preferred accepting from the Arabs what they considered a degrading tolerance. The following singular mode of decision was adopted for the purpose of settling the question between the two missals. The King, Alonzo the Sixth, the Archbishop Don Bernardo, and the court, were among the advocates of the new missal, which, being adopted in Rome, they were very desirous of establishing on the occasion of the restoration of the Christian supremacy at Toledo. The mass of the people were attached to their ancient forms. It was resolved that the question should be decided by an appeal to a sort of neutral power; and Mars was selected, probably on account of his being a person disinterested in the affair. A champion was chosen by each party, and a day appointed for settling the difference by single combat. Accordingly, the court, the clergy, and the people being assembled, the representatives of the two missals took their station, lance in rest, and on the appointed signal spurred to the encounter. The ancient missal was approved of by the warlike god; but the King and his party were dissatisfied with the result, and resolved on another trial. A large fire was lighted in the principal plaza, and the two missals were thrown into it.