The apse, from the Latin absis, meaning arch, appears as a semi-cylindrical or polygonal structure and is present in both public buildings and churches.
Usually, in churches, it concludes the main nave, beyond the presbytery, or the two side aisles and symbolises the privileged place where the presence of God is manifested.
During the Renaissance, the quadrangular shape known as the “scarsella” also became popular. The apse was first used in ancient Rome, in the Republican era, both in temples and public buildings. In the Imperial era, it was located on the smaller side of the building, especially in basilicas, and became a privileged place dedicated to the emperor or for placing religious statues.