a carved marble masonry, which ends with a bevel to adhere to the wall. Thus, the great walls of the Cathedral are made with a masonry filling of river stone, with lime mortar and sand. These are covered with brick walls, also with a lime and sand mortar. The thickness of the walls varies, since the widest ones have four meters (towers), followed by the ones of 1.40 meters (outer walls of the naves), and finally the narrowest of one meter (outside of the house) Domes There are two types of domes: Low: constituted by spherical shells, seated directly on the arches. Tall: linked or seated on the arches by means of four spherical triangles (called pendentives). On these pendentives sits a ring, from which a cylinder is generated (called drum) that is crowned by a vault banked. At the top of the dome, there is the Lantern, of Renaissance architectural design. Materials The construction has a variety of materials. Most are typical of the mountain region and the city. Other materials were brought from Europe. Below is a survey of the elements with their respective materials: Foundations: stone masonry with lime mortar. Walls: brick masonry with lime mortar. Floors: marble, tile, and wood. Cover: brick shells with lime mortar. Downspouts: ducts formed in the walls of the bricks. Plaster: only inside, with whitewash. Ceiling: pasted and painted, false plaster. Stairs: brick with lime mortar. Structure: constituted by columns and arches. Columns: brick masonry with lime mortar. Arches: brick and lime mortar. Doors: iron and wood. Windows: wood, metal, and decorated glass. Decorative moldings: brick, plaster, ceramics, and marble. Facilities The temple is equipped with the following facilities: Sanitary: potable water system and wastewater channeling. Electrical: lighting system and power shut-offs. Special: acoustic amplification system. All these facilities are conducted by independent underground duct systems under the floor. There are inspection wells located on-site for control and maintenance as well as control boxes for the water and electrical systems. Maintenance Cracking problems have arisen in some elements: The first High Dome after the Towers. Here, the crack reached up to 1 cm and 1.50 cm, and when it rained, water leaked out. However, this was fixed by covering it with a cement paste. On the advice of the engineers José Chacón Toral and Rafael Carrasco, the cracked are was monitored and further cracking has not progressed. On the key of