Palladian window

A Palladian window.

puh-LAY´-dee-uhn

A Palladian window is a large, composite window made of
three vertical sections. The middle section, which is wider than
the side sections, has an arched top.

Palladian windows, also referred to as Venetian windows, are
named for Andrea Palladio (1508-80), the 16th-century Italian
architect who often used them in his designs.

The windows are a common feature of architectural styles
based on Palladio’s works, including Georgian (c. 1714-1830),
popular in Britain and its colonies, and Federal (1785-1820),
unique to the post-revolutionary United States.