Hardly less interesting, but very far from being as well known, is the ancient mosque in the Calle de las Tornerias. It is contained in the upper part of the private houses numbered 27, 29, and 31. The mosque having been built against a steep incline, it was raised on a substructure of galleries, which now form the ground floor of the modern houses. The mosque was never converted to Christian uses, and retains its original physiognomy almost unimpaired. In the opinion of Spanish archæologists, it belongs to the same period as the Cristo de la Luz; but Street does not share this view, and thinks it a later work. Like the other mosque, it is built more or less in the form of a square, and has likewise Visigothic columns and capitals, pointing to the existence of a previous structure. Here, also, we find the horseshoe arch and the cupola, and evidences of the position of the kiblah. Recent restorations have shown that the walls are composed of the finest brickwork, unsurpassed for smoothness and regularity. But so far no trace has been revealed of any texts from the Koran, or inscription commemorating the architect’s name, such as were usual in the Mohammedan temples of Spain. The Puerta Antigua de Bisagra, or ancient gate of Bisagra--not to be confounded with the new gate of the same name built by Charles V.--is dilapidated and falling to pieces. In Moorish times it was the principal entrance to the city. The name was probably originally Bib-Sahla. It dates from about the beginning of the tenth century, but to the primitive structure only the foundations of the gate belong. A reconstruction seems to have been carried out at the time of the Reconquest, and to that epoch the arch, or gate, properly speaking, may be assigned. The upper portion of the time-worn fabric belongs to a still later period. This is the only one remaining of the fifteen gates with which the walls of Toledo appear to have been furnished during the Mohammedan occupation.