A magnificent and most finely-built staircase, with splendidly-sculptured monsters, kept us for some minutes riveted with admiration. I am ignorant whither it leads, or into what room the small door at its extremity opens, but it is worthy of the most splendid palace. The high altar in the chapel of the Duke d'Abrantes is one of the most singular productions of the imagination which it is possible to behold. It represents the genealogical tree of Jesus Christ. This strange idea is carried out in the following manner:--The patriarch Abraham is lying at the bottom of the composition, and in his fertile breast are placed the spreading roots of an immense tree, each branch of which bears an ancestor of Jesus, and is subdivided into as many branches as that ancestor had descendants. The summit is occupied by the Virgin Mary on a throne of clouds, while the sun, the moon, and a multitude of gold and silver stars, shine through the foliage. It is impossible to think without a shudder at the immense amount of patience which must have been required to cut out all these leaves, chisel all these folds, and make all these personages stand out so prominently. This _retablo_, carved in the manner we have described, is as high as the _façade_ of a house, that is to say, at least thirty feet, if we include the three stories, the second of which represents the crowning of the Virgin, and the third the Crucifixion, with St. John and the Virgin. The sculptor is Rodrigo del Haya, who lived in the middle of the sixteenth century.