A reredos is a decorative screen or backdrop located behind the altar in a church. It often features intricate carvings, paintings, or sculptures that depict religious scenes or figures, enhancing the spiritual atmosphere of the space. Reredoses can be made from various materials, including wood, stone, or metal, and are commonly found in many styles of architecture, particularly in Gothic and Baroque churches. Historically, the purpose of a reredos was to serve as a visual focal point during worship, drawing attention to the altar and the sacrament of the Eucharist. Many reredoses also include elements like the crucifix or images of saints, contributing to the overall narrative of the church's religious teachings.