Scottish architect who worked at the court of Catherine II of Russia.
ODNB Entry:
https://doi.org/10.1093/ref:odnb/37258
Commonly known as Vitruvius, he was a Roman author, architect, civil engineer and military engineer during the 1st century BCE, known for his multi-volume work entitled De architectura. His discussion of perfect proportion in architecture and the human body led to the famous Renaissance drawing by Leonardo da Vinci of Vitruvian Man.
Wikipedia entry: https://en.wikipedia.org/wiki/Vitruvius