The sanctuary is entered through a semi-circular triumphal arch, the molded archivolt of which is fitted into the nave vault. It springs from a pair of posts in the entablature, themselves supported by two proud pilasters which have Composite capitals doubletted forwards The sanctuary vault is a little saucer cupola in pale blue, with a glory in the middle.The wall above the aedicule has a monochrome depiction of The Exaltation of the Cross.