THE antiquity of the city of Leon and its importance as a Roman station are well shown by its picturesque and strong walls, which in many places yet exhibit clearly Roman masonry in the substructure and general form. On other places, subsequent generations of artificers have left unmistakeable autographs inscribed in most legible and durable forms, attesting dates of construction, dilapidation, restoration, and then again dilapidation, through centuries of tempestuous existence. One of the most picturesque bastions of these old walls is the one shown in my sketch which groups exceedingly well with the fine Romanesque steeple of San Isidro, which stands on the west of the Church but altogether detached from it. Both Church and steeple date from about the middle of the twelfth century, and possess great historical and architectural interest. Their historical interest is due to their association with the fervidly pious Queen Sancha; and to the fact that in the Pantheon, or chapel dedicated to Santa Catilina at the north-west end of the Church, probably grouped around the body of the Saint, repose Kings and Queens of Spain from Fernando I. and Doña Sancha the founders of the Church, through eight generations. Their architectural interest is derivable from the constructional and ornamental details dwelt upon by Mr. Street, to whose excellent account of the building the reader may be referred. [Illustration: PLATE 9 LEON SAN MARCOS MDW 1869] PLATE IX. _LEON._ CONVENT OF SAN MARCOS.