Ionic, Iconic

John Wood designed the Royal Crescent with Ionic columns on a rusticated ground floor. The 114 columns are 30 inches in diameter reaching 47 feet , each with an entablature 5 feet deep. The central house (now the Royal Crescent Hotel) boasts two sets of coupled columns. The Ionic column is always more slender than the Doric: Ionic columns are eight and nine column-diameters tall, and even more in the Antebellum colonnades of late American Greek revival plantation houses.

[Wikipedia]