Ionic order cap is usually enriched with egg-and-dart. Since Vitruvius, a female character has been ascribed to the Ionic (in contrast to the masculine Doric). The major features of the Ionic order are the volutes of its capital, which have been the subject of much theoretical and practical discourse, based on a brief and obscure passage in Vitruvius. The only tools required to design these features were a straight-edge, a right angle, string (to establish half-lengths) and a compass. Below the volutes, the Ionic column may have a wide collar or banding separating the capital from the fluted shaft (as in, for
Brentwood Cathedral and Welsh slate roof tiles. All the Classical architectural orders are represented in the interior - the four giant Doric pilasters, the Tuscan arcade of arches, the Ionic pilasters of the Palladian windows in the east and west aisles, the Corinthian and Composite influences evident on the cathedral and the organ case. While the interior of the cathedral has a deliberately 'restrained' feeling to it, richness is to be found in the ceiling. The Roman key pattern and the double guilloche pattern, picked out in gold leaf, are dominant here. All the round-headed windows are in the Classical-Wren style, with