A recess in the wall of a building, the niche is often topped with a spherical half-cap. Depending on the shape, there are different types of niches: semicircular, rectangular, polygonal. The niche is also an important decorative element intended to hold votive statues or images for worship.![](https://www.smarteducationunescosicilia.it/wp-content/uploads/2021/01/appr-7222-glossario-nicchie-angolari-768x1024.jpg)