 The temple is of great dimensions, has a length of 120 meters and 36 meters of height, in its internal central area, occupying an area of 10,000 square meters.In the 15th century, the eastern end was rebuilt to create a double ambulatory.In the 17th century, the cathedral chapter retained architect Ventura Rodríguez to build the altar of Saint Julian, also known as "el Transparente" for the stained glass illuminating and decorating the background of the altarpiece.