A Vitruvian opening is a window or frame that is slightly larger at the bottom than the top. The term was first described by

Vitruvius Vitruvius (; c. 80–70 BC – after c. 15 BC) was a Roman architect and engineer during the 1st century BC, known for his multi-volume work entitled '' De architectura''. He originated the idea that all buildings should have three attribut ...

and mentioned by

Andrea Palladio Andrea Palladio ( ; ; 30 November 1508 – 19 August 1580) was an Italian Renaissance architect active in the Venetian Republic. Palladio, influenced by Roman and Greek architecture, primarily Vitruvius, is widely considered to be one of ...

, referring to a window at the Temple of Vesta at Tivoli. The term ''Tivoli window'' is also used.

References

{{authority control Windows Ancient Roman architectural elements Palladian architecture