Nave
The nave and two side
aisles were originally
covered with a flat roof.
This was replaced in the
12th century with ribbed
vaulting.Eastern tower
The tower placed over the crossing
is octagonal in form. The series of
small arches just below the parapet
of the spire is known as a dwarf
gallery, and it is a distinctively
Romanesque feature.
Staircase towers
Two of these towers flank the
apse. The structures, dating
from the 1000s, are the
only remaining parts of the
earlier cathedral destroyed
in a fire. They represent a
good example of the early
Romanesque.Apse
The rounded apse
with its dwarf gallery
is a distinctive feature
of Romanesque
architecture.NATIONAL GEOGRAPHIC HISTORY 71