“Copying in architecture is at least as old as tracing paper. Thomas Jefferson’s University of Virginia was an effort to import Palladio’s neo-Roman vision to the New World. And the first United States copyright act, passed in 1790, made no provision for architecture. It wasn’t until 200 years later, in 1990, that the United States added buildings to the list of things – including movies, books and recordings – that qualify for copyright protection. But even among architects with instantly recognizable styles, it’s rarely possible to state with certainty which similarities result from direct imitation and which are coincidental.”