festoon

festoon sculptured or painted architectural or interior ornament consisting of a garland of leaves, flowers, or fruit, or some combination of these, held by ribbons or folds and draped at the ends. When a festoon hangs down from only one end, it is called a drop, but when it hangs from both ends it is termed a swag. The festoon reproduces the actual garland used on Greek and Roman festal altars and was much used as a decorative feature in Roman and Renaissance art. It was often represented as carried by putti, or infant figures.

fes·toon / fesˈtoōn/ • n. a chain or garland of flowers, leaves, or ribbons, hung in a curve as a decoration. ∎  a carved or molded ornament representing such a garland. • v. [tr.] adorn (a place) with chains, garlands, or other decorations: the room was festooned with balloons and streamers.

festoon curved chain of flowers, etc. XVII. — F. feston — It. festone prop. ‘festal ornament’. f. festa FEAST; see -OON.
Hence as vb. XVIII.