architectural

Etymology

architecture + -al

adj

1. Pertaining to architecture.
   The original family who had begun to build a palace to rival Nonesuch had died out before they had put up little more than the gateway, so that the actual structure which had come down to posterity retained the secret magic of a promise rather than the overpowering splendour of a great architectural achievement. 1963, Margery Allingham, chapter 1, in The China Governess
2. Resembling architecture in style; seeming to have been designed (by an architect).