Palladian motif
A three-part window with a large central arch flanked by two smaller rectangular openings. Named after 16th-century architect Andrea Palladio, it is also called Palladian window. First detailed by Sebastiano Serlio in Architectura (1537), it is also known as Serliana or the Serlian motif. Since similar designs predate both architects, it is sometimes referred to as a Venetian window. Widely used in 17th- and 18th-century Palladian architecture, it became especially popular in Britain.