chapel, and three towers, two western ones terminating the aisles
and flanking the gable of the nave, and the great central tower
rising from the crossing. The monastic buildings were also on a
magnificent scale, but of the church and monastic structures there
only now remain the Norman nave, the base of the Lady Chapel, and
part of the refectory and kitchen.

The nave is well preserved and the piers are circular. The plan of
these with that of the wall responds shows that the original
intention was to groin the aisles. The two eastern bays between the
eastern pillars are built up with solid masonry, and only a portion
of the arches is visible. The two western bays and the triforium
arches above them have also been filled up with solid building to
strengthen the western towers.[340] "The pillars which support the
west towers are of greater size than the others, and are of a
different section. One of the pillars and the corresponding arch of
the north arcade are of late Gothic work, and may be part of the
repairs ordered by the Privy Council in 1563, or of the work done in
1594 under the direction of William Schaw, Master of Works, who at
that time built the north-west tower and steeple, as well as the
porch on the north side of the nave. At the same time, also, certain
great buttresses were built against the outer walls, which are now
conspicuous features of the structure."[341]

The great western doorway, a good example of Norman work, remains
unaltered, and consists of five orders, having alternately round and
octagonal shafts, chiefly with cushion caps, but some are ornamented
with scrolls. The abacus is heavy, and is carved with sunk diapers.
The orders are continued round the arches, and contain chevron
ornaments (much decayed), rosettes, and diapers.[342] The outer
order contains large heads and geometric figures in the alternate
voussoirs--an arrangement similar to that of Whithorn and Dalmeny,
where the geometric figures also resemble those adopted here.[343]
The _original_ north doorway, partly concealed by Schaw's porch, is
similar in design, with the addition of an arcade above the arch,
resembling but still plainer than that over the doorway of Dalmeny
Church. The south doorway of the church is of late work, and there
appears to have been another south doorway at the