The word architecture is used in many ways by many different people. Here we explore the range of ways this term can be used and is used with respect to understanding of enterprises. We use the funny word "architectonics" to denote this type of study of architectures themselves. This is similar to the way some folks like to think of "methodology" as the study of methods, while others see that term as a synonym for "method".
Architecture is: “Construction or structure generally; both abstract and concrete.” *
* Oxford English Dictionary
Let's call this "classic architecture", because that sounds more elegant and graceful than some alternatives like "architecture of buildings". Technically that is exactly what we're talking about here. The architecture of Vetruvius, and Wright and Pei.
Here are some sources of classic architecture discussion:
Here are some sources of discussions of enterprise, IT, and business architecture discussed in comparison to classic architecture:
Whatever you think of architecture, lay that template on the subject of business.
At a minimum architecture of business means structure. So, what is the structure of business? Not an easy question.
Business is obviously not buildings alone.