Decorative architectural devices include columns, pilasters, arcading, cornices, moldings, finials and tracery. It features extensive Romanesque designs, including pilaster buttresses and arcading. The east elevation, along Pearl, has circular arcading and banded pilasters. They form balustrades of colonettes as an alternative to miniature arcading. Roman-sized brick tiles are used in the arcading and other arches. The exterior ornamentation is often limited to a modicum of blind arcading. It is flanked by twin towers decorated with blind arcading. Alternatively, a blind arcade superimposes arcading against a solid wall. It is boldly decorated with circles, lozenges and interlaced arcading. The style was much used in England for wall arcading and niches. The curved blind arcading throughout is unaltered from the 11th century. The exterior is decorated with blank arcading. The exterior is distinguished by the liberal use of ornamental blind arcading. The kitchen garden walls contain further recessed arcading for fruit trees. Mouldings were cut with geometric designs and arcading was a major decorative form, particularly externally.