The five eastern apses, of which the largest in the centre is also twice as high as the other four, are probably the oldest part of the building, but all, except the two outer apses and the upper part of the central, have been concealed by the Pateo built by Dom Manoel to unite the church with the Capellas Imperfeitas, or unfinished chapels, beyond. Here there is nothing very unusual: the smaller chapels all end in three-sided apses, at whose angles are buttresses, remarkable only for the great number of string courses, five in all, which divide them horizontally; these buttresses are finished by two offsets just below a plain corbel table which is now crowned by an elaborately pierced and cusped parapet which may well have been added later. Each side of the apse has one tall narrow single-light window which, filled at some later date from top to bottom with elaborate stone tracery, has two thin shafts at each side and a rather bluntly-pointed head. The central apse has been much the same but with five sides, and two stories of similar windows one above the other. So far there is nothing unexpected or what could not easily have been developed from already existing buildings, such as the church at Thomar or the Franciscan and Dominican churches no further away than Pontevedra in Galicia. Coming to the south transept, there is a large doorway below under a crocketed gable flanked by a tall pinnacle on either side. This door with its thirteenth-century mouldings is one of the most curious and unexpected features of the whole building. Excepting that the capitals are well carved with leaves, it is a close copy of the west door of São Francisco at Santarem. Here the horseshoe cuspings are on the out-most of the five orders of mouldings, and the chevron on the fourth, while there is also a series of pointed cusps on the second. Only the innermost betrays its really late origin by the curious crossing and interpenetrating of the mouldings of its large trefoiled head. All this is thoroughly Portuguese and clearly derived from what had gone before; but the same cannot be said for the crockets or for the pinnacles with their square and gabled spirelets. These crockets are of the common vine-leaf shape such as was used in England and also in France early in the fourteenth century, while the two-storied pinnacles with shallow traceried panels on each face, and still more the square spirelets with rather large crockets and a large bunchy finial, are not at all French, but a not bad imitation of contemporary English work. On the gable above the door are two square panels, each containing a coat-of-arms set in a cusped quatrefoil, while the vine-leaves which fill in the surface between the quatrefoils and the outer mouldings of the square, as also those on the crowns which surmount the coats, are also quite English. The elaborate many-sided canopies above are not so much so in form though they might well have been evolved from English detail. Above the