'Architecture' may at first appear to be a more fixed and finite term. It has a threedimensional, tangible, useable form. But questions remain about what can be considered architecture and what cannot, and by this I mean that we usually understand architecture to incorporate aesthetic as well as functional consideration into its structure. Anything that does not fall into this category can be described as 'just a building'. This may seem too simple. Can architecture be determined solely by the use of refined architectural style – high or polite architecture instead of vernacular?

Ch. 1 : Reading the past : What is architectural history? - Reading Architectural History (2002)