The works of Francisco de Zurbaran are collected in the old convent choir. In the centre is, La Apotéosis de Santo Tomás de Aquino, considered by some critics the masterpiece of Zurbaran. It is a triple altar-piece, allegorically representing the death of the patron of the College of St. Thomas. The saint is ascending to heaven to join the blessed Trinity, the Virgin, St. Paul, and the hosts of glory. Below sit the venerable figures of the Doctors of the Church; on the right kneels the Bishop Diego de Dega, the founder of the college, while the Emperor, Charles V., with a train of ecclesiastics, stands upon the left. The dark, mild face of the figure immediately behind the Emperor is supposed to be the portrait of Zurbaran. As a work of art the picture is defective; it lacks charm, and the literary interest of the composition is too diffused. The execution is excellent, the colour, though sombre, is rich with a splendid mellowness of tone, while each of the heads bears the imprint of being a separate study. [Illustration: THE ROAD TO CALVARY _Valdes Leal_] The three studies of Carthusian monks amply manifest the charm which this allegorical composition lacks. La Virgen de las Cuevas, and San Hugo en el refectorio will be found on either side of the choir, while the third of the series, Confrencia de San Bruno con Urban II. hangs close to the St. Thomas. The genius of Zurbaran is disclosed in these scenes of monastic life. All three pictures are executed with remarkable fidelity, but the finest of the three is St. Hugo visiting the monks in their refectory. It is painted with realistic and individual truth. The monks, clad in the white robes of the Carthusians, sit around a table at their mid-day repast. In the foreground stands the aged figure of St. Hugo, attended by a young page. The saint has come to reprove the order for unlawfully dining upon flesh meat. His purple vestments supply an effect of fine colour, which contrasts with the dull white cowls and frocks of the brothers. What cold, passionless faces! Zurbaran has embodied the very spirit of asceticism. Each monk is a portrait, probably drawn from life. It is a perfect realisation of a monastic scene from the life of ancient Spain.