As the great doorway for "Solemnities" requires a wider opening in front than the two side ones in daily use, the two central pairs are placed _Eustyle_--_i.e._, with a supposed space between of two and a half diameters--while the rest are placed _Pycnostyle_--one and a half diameters.[85] In the second story, owing to the towers above, the outside couples are displaced by pilasters; and the eight remaining columns support the architrave and cornice, and the great triangular pediment above of seventy-four feet in breadth and eighteen in height. On this is represented in bas-relief the Conversion of St. Paul. Saul of Tarsus still seated on his horse, which is crouching on the ground, looks up at the rays of light; and the alarmed escort are trying to control their frightened steeds. In the distance is Damascus. The sculpture is the work of Francis Bird, and he was paid for it the handsome sum of L650. The statue on the apex is that of the patronal saint; the two near him are those of St. Peter and St. James, while the four more remote are those of the Evangelists, with their emblems taken from Rev. iv. 7. The Towers, with their Italian details, complete the Facade. They consist of five stages besides the domes, of which the two lower correspond with the rest of the front. The third is pierced with circular openings, which in the southern are filled up with the faces of the clock. The fourth is transitional between the square and the octagon; from each angle of the square below spring two pairs of Corinthian columns, half-concealing, half-revealing the supports of the small domes. The fifth is an octagon, with two orders of open arches in each face, and an exterior arcading, urn-shaped pedestals being freely adopted as in the stage below. The domes, the pine of which was modelled by Francis Bird, is designed with curves of contrary flexure for the purpose of adding to the height. Mr. Longman likens these towers to Alpine aiguilles, and points out how picturesquely they form outposts to the great mass of the dome.