Not sure where these ruins are
Prior to the exhaustive and diverse design representation tools of our modern age information about building construction depended primarily on spoken and written communication. At least, this is the impression that the historical record conveys. The Bible gives written descriptions of various temples, but any effort to physically realize these structures would result in endless variations. Architectural plans, no matter what age they come from, are like DNA---critical features are proscribed but the ultimate form of the geometry depends on the influence of the environment.