Lunette

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Lunette over the main door of the Luxembourg Palace in Paris

In architecture, a lunette (French lunette, "little moon") is a half-moon shaped space, either filled with recessed masonry or void. A lunettemed when a horizontal cornice transects a round-headed arch at the level of the imposts, where the arch springs. If a door is set within a round-headed ar the space within the arch above the door, masonry or glass, is a lunette. If the door is a major access, and the lunette above is massive and deeply set, it may be called a tympanum.

The term is usefully employed to describe the section of interior wall between the curves of a vault and its springing line. A system of intersecting vaults produces lunettes on the wall surfaces above a cornice. The lunettes in the structure of the Sistine Chapel ceiling inspired Michelangelo to come up with inventive compositions for the spaces.

In the Neoclassical architecture of Robert Adam and his French contemporaries like Ange-Jacques Gabriel, a favorite scheme set a series of windows within shallow blind arches. The lunettes above lent themselves to radiating motifs: a sunburst of bellflower husks, radiating fluting, a low vase of flowers, etc.

A lunette may also be segmental, and the arch may be an arc taken from an oval. The spaces are still lunettes.

A lunette is commonly called a half-moon window, when the space is used as a window.

Lunettes of the Medicean villas by Giusto Utens[edit]

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