Over ten years ago, Joe Yoder and I opined that, while much attention had been focused on high-level software architectural patterns, what was effect, the de-facto standard software architecture had seldom been discussed: the Big Ball of Mud (http://www.laputan.org/mud/mud.html).
It has become, God help us, our best known work. And, somewhat to our amazement, since then, no one has ever undertaken to dispute this premise.