Roman Catholics know that their religion needs no surroundings, no accessories in order to stand apart from everything that is not part of their religion. Yet, on the other hand, a religion without external worship can lead to indifference.
As of the 17th century, religious art focussed primarily on churches. As a result of their dimensions and the values inherent in churches, they became primary sites of artistic expression. The high altar, located in the sanctuary of the church, is the focal point of the building. Shapes underwent periodic transformations and changes in taste resulted in decorations and pieces of religious furniture in a wide variety of styles: Louis XIV, Louis XV, Louis XVI, neo-classical, Victorian, etc.