The Collaborative International Dictionary of English v.0.48:
Architectural \Ar`chi*tec"tur*al\, a. Of or pertaining to the art of building; conformed to the rules of architecture. -- Ar`chi*tec"tur*al*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
architecturally adv 1: with regard to architecture; "this building is ugly, but architecturally interesting"