niche, in architecture, decorative recess set into a wall for the purpose of displaying a statue, vase, font, or other object. Niches were used extensively in both interior and exterior walls by the architects of ancient Rome. A fine extant example of such use is found at the Roman Temple of Diana at Nîmes, France.
Gothic examples of the decorative recess are ubiquitous, including niches in medieval structures, where they often have canopies or gables over them, such as the English cathedrals at Wells and Peterborough. Later architects, especially those of the Italian Renaissance and the classic revival of 17th- and 18th-century Europe, all made use of the niche. Semicircular niches are often featured, many having shell-like fluting at the apex.