It began to be built on the initiative of its first bishop,
Jerome of Périgord (died in 1120) after the restoration of the diocese of Salamanca by King
Alfonso VI of León, and after the repopulation of the city carried out by his son-in-law
Raymond of Burgundy. This was a period in which
Romanesque was giving way to
Gothic, something that can be seen in the difference between the pillars and the starts of the
ribbed vaults, since there is no constructive continuity between them, as the former were designed to support a
barrel vault, and the cathedral was completed in 1236. It was on the verge of being destroyed in the early modern Age, since when the
New Cathedral was planned, it was thought to be demolished, but the long period of time that elapsed from the beginning of the works of the New Cathedral (around 1520) and the late date of completion (around 1733), as well as the need of a space where to celebrate the cult while the construction was finished, made that the initial decision to demolish it was abandoned. In this sense, in plan, the left nave appears narrower and part of the transept arm is missing, as a consequence of the construction of the New Cathedral. It is a basilica-shaped building, with a Latin cross and three naves, a marked transept and a chevet formed by three semicircular apses, which show windows with semicircular arches on the exterior. Given the frontier character of Salamanca, it was also designed as a fortress, a quality now not so visible, since the battlements of the Mocha Tower have disappeared and the roof of the nave, formerly a walkable terrace, has been replaced by another of
Spanish tile. For this reason it was popularly known as
fortis salmantina. The works began to be carried out by the apse, that is why this would be the oldest part, being able to contemplate the change of style in the vaults that cover the naves, since they were projected groin vaults and were replaced by ribbed vaults. The most outstanding element of the monument is the considerable dome that rises over the transept supported by four impressive pendentives, and whose date of construction should be placed around 1150. On the inside it is shaped like an open orange with sixteen segments, while on the outside it is almost conical in shape, decorated with scales, and is popularly known as the "Torre del Gallo" (Tower of the Rooster), since this animal appears on the weathervane that crowns it. It rests on a drum with sixteen columns in the interior, lightened by 32 windows, 16 nerves cross meeting in the central part of the dome. The model of the dome is based on that of the
Cathedral of Zamora, which was the first of the
group of Duero domes, also called Leonese or Byzantine-Leonese domes (group formed by the domes of the cathedrals of
Zamora,
Old Cathedral of Plasencia, the Old Cathedral of Salamanca itself, and that of the
Collegiate Church of Toro), which have a similar structure with two different domes, one on the inside and the other on the outside, between which there would be a filling of gravel and earth, although they rest one on the other. The exterior decoration of scaled form is very curious and difficult to trace in the History of Art, there being similar decorations in churches in Turkey, although they also appear in the decoration of the towers of the
Church of Notre-Dame la Grande in
Poitiers, a much more probable influence than the Turkish, if it is taken into account that people from France participated in the repopulation of the city. Little remains of the original main façade, covered by another of the 13th century. It is flanked by two towers; the one on the left (torre de las campanas) was left under the tower of the
New Cathedral, and the one on the right, which was never finished, was given the name of Torre Mocha, and can still be seen. The new doorway, shortly after being built, was partially covered, on the left side, by the stone slope that had to be made to reinforce the bell tower after the
1755 Lisbon earthquake. Other attractions of the temple are the main altarpiece from the 15th century, attributed to Nicolò Delli (1430), and the upper fresco, representing the
Last Judgment, which is certainly by
Nicolò Delli (1445). The apse houses a large cycle of 53 tableaux, 12 of which by the 15th-century Italian artist
Dello Delli, depicting the life of
Jesus and the
Virgin Mary. At the foot, under the Torre de las campanas, is the chapel of San Martín or del Aceite. The latter was painted by
Antón Sánchez de Segovia in 1262. In the cloister there are some frescoes from the 13th-14th centuries that decorate the sepulchres and a series of chapels open, among which are the Chapel of Talavera, the Chapel of Santa Barbara, with the tomb of the bishop
Juan Lucero, in which the examinations of degree of the
University of Salamanca were carried out, the chapel of Santa Catalina and the chapel of San Bartolomé or de Anaya.
Juan Francés de Iribarren was organist at the Old Cathedral in 1717–1733. == The main altarpiece ==