The Latin-speaking Vitruvius, author of De Architectura, the first surviving text on the architecture of the Greeks and Romans, reads classics.

He opens the path of the Epistemology of Ancient Greek Architecture and, more broadly, of the Sciences of Space in the historical periods that follow.

This study investigates the Platonic contribution to Vitruvius' epistemological reflections. The term "architecture" is unmentioned in the texts of the Philosopher. Therefore, this is attempted through comments and notes on the excerpts of the Platonic texts that contain the terms "architectural," "architect," and other related terms.

They are connected to the architectural matters of his time, with two concepts of epistemological interest (práxis and gnósi), with the pair to build a craft / always to know (and the related pairs) and "virtue."

Plato uses the technique of analogy, subordinating his technical examples to the issues of Ethics, aiming at Ethics.

Of course, the reader—if he has not read Popper—closes the book with the question: why, besides the unmentioned "architecture," does Plato in his references to the Athenian built space overlook what, then and now, everyone notices when gazing at the Rock?