What oral tradition could teach previous to the publication of these texts in Spain, no doubt the architect of the Cathedral of Granada, Diego de Siloe, had learnt from his father, Gil, the even more celebrated Sculptor of Burgos; whose monuments to Don Juan II., his Queen, Donna Isabel, and the Infante Don Alonso, and whose "Retablo" in the Cartuja of Miraflores in the outskirts of that city, have never been surpassed in tasteful elaboration.[46] From whatever source Diego de Siloe may have obtained his knowledge, certain it is that he must share with Alonso Covarrubbias, the honour of having been the earliest revivers of classical architecture in Spain: not in its details only as had been attempted by the early Plateresque architects, but in its structural proportions and in its symmetrical arrangements of great leading features. The following is the account of the construction of this Cathedral given by Amirola.[47] "It was begun," he says, "on the 15th of March, 1529, and consists of three naves, the principal of which terminates in the choir after the Gothic manner. It is four hundred and twenty-five feet (Spanish) long, and two hundred and forty-nine wide. The order is Corinthian, but defective in its true proportions, since the principal nave is only forty-five feet wide, its height is one hundred and twenty." It would profit us but little to follow Amirola through his straight-laced criticisms on a design the beauty of which he was unable to apprehend; and it may be well to take a larger and juster view of its merits. The following which, I heartily endorse, is the verdict of a far better judge.[48] "Looking at its plan only, this is certainly one of the finest churches in Europe. It would be difficult to point out any other in which the central aisle leads up to the dome, so well proportioned to its dimensions, and to the dignity of the high altar which stands under it, or one where the side aisles have a purpose and a meaning so perfectly appropriate to the situation, and where the centre aisle has also its functions as perfectly marked out and so well understood. All this being so, it is puzzling to know how it has been so neglected."