Having passed this elegant and elaborately-wrought doorway, we enter that portion of the church called by the old writers
which consists of an inner circular area formed by a round tower resting on six clustered columns, and of a circular external aisle or cloister, connected with the round tower by a sloping roof on the outside, and internally by a groined vaulted ceiling. The beauty and elegance of the building from this point, with its circular colonnades, storied windows, and long perspective of architectural magnificence, cannot be described--it must be seen.
From the centre of the Round, the eye is carried upward to the vaulted ceiling of the inner circular tower with its groined ribs and carved bosses. This tower rests on six clustered marble columns, from whence spring six pointed arches enriched with numerous mouldings. The clustered columns are composed of four marble shafts, surmounted by foliated capitals, which are each of a different pattern, but correspond in the general outline, and display great character and beauty. These shafts are connected together by bands at their centres; and the bases and capitals run into each other, so as to form the whole into one column. Immediately above the arches resting on these columns, is a small band or cornice, which extends around the interior of the tower, and supports a most elegant arcade of interlaced arches. This arcade is formed of numerous small Purbeck marble columns, enriched with ornamented bases and capitals, from whence spring a series of arches which intersect one another, and produce a most pleasing and striking combination of the round and pointed arch. Above this elegant arcade is another cornice surmounted by six circular-headed windows pierced at equal intervals through the thick walls of the tower. These windows are ornamented at the angles with small columns, and in the time of the Knights Templars they were filled with stained glass. Between each window is a long slender circular shaft of Purbeck marble, which springs from the clustered columns, and terminates in a bold foliated capital, whereon rest the groined ribs of the ceiling of the tower.
From the tower, with its marble columns, interlaced arches, and elegant decorations, the attention will speedily be drawn to the innumerable small columns, pointed arches, and grotesque human countenances which extend around the lower portion of the external aisle or cloister encircling the Round. The more these human countenances are scrutinised, the more astonishing and extraordinary do they appear. They seem for the most part distorted and agonised with pain, and have been supposed, not without reason, to represent the writhings and grimaces of the damned. Unclean beasts may be observed gnawing the ears and tearing with their claws the bald heads of some of them, whose firmly-compressed teeth and quivering lips plainly denote intense bodily anguish. These sculptured visages display an astonishing variety of character, and will be regarded with increased interest when it is remembered, that an arcade and cornice decorated in this singular manner have been observed among the ruins of the Temple churches at Acre, and in the Pilgrim's Castle. This circular aisle or cloister is lighted by a series of semicircular-headed windows, which are ornamented at the angles with small columns.