A problem arises, though, if we look to history or sociology for a unified account with common features of an architectural discipline. While architectural practice has remained stable in certain respects, change over its history greatly limits common features, perhaps, to a core set of basic tools and rudimentary principles of structural engineering. This suggests that, at root, the practice of architecture must involve engineering or related design. But architecture can’t be reduced to a form of engineering, if we think architectural ideals, taste, and expertise contribute something over and above engineering facts, rules, and practical knowledge. These further contributions suggest an art or art-like role for architectural practice. However, the historical record is mixed on the matter of whether architects are at the same time pursuing art (or what we now consider as art) or should be thought of as artists. Moreover, the historical record and resulting disjunctive claim do not address cases where even the most basic tools or structural principles are not deployed. Some such cases of not observing basic structural principles, as fantasy architecture, may be deemed marginal; other such cases, as landscape architecture, are not.