With a diameter of 108 meters, in the large basilica there are; a large chapel, a prayer house, and at the top the largest dome in Spain. The basilica's width is 33 meters, and 58 meters tall, making it the largest building in Spain.
The basilica, built in the neo-Classical style, stands on the ruins of a Franciscan monastery, founded in 1217, by Saint Francis. It itself was built by Spanish King Carlos III, in 1760.
The San Francisco Basilica has three chapels. The most famous of them is on the left side of the main entrance. It is named after San Bernardino de Siena (San Bernadino from Siena).
In this chapel you can see the "Sermon of San Brandino of Siena." This is a magnificent painting by the Spanish painter Goya, who commemorates events in the life of the saint. The painting is one of Goya's first paintings in Madrid. If you look closely at the painting you will see the figure on his right. This is the painter Goya himself, introducing a self-portrait. The cathedral also has paintings by Velazquez, another Spanish painting giant.
In the nearby chapel you can see an impressive statue painted in 1643 by the artist Diego Rodriguez. The name of the statue is "Capilla del Cristo de Los Dolores."
The cathedral has great woodwork, including carved wooden furniture, wooden choral stalls and the 7 wooden doors of the church carved by the wooden artist Casa Juan Guas.
The huge dome of the basilica, 33 meters in diameter, was designed by architect Francisco Cabezas. Due to the difficulty and complexity of building such a chapel, the construction of the basilica was completed only in 1784 by an architect who was added to the complex project, Francesco Sabatini.
At the base of this dome are wooden statues of the 12 Christian apostles and on the inside there are beautiful frescoes, that is, magnificent frescoes.
In the past century the instability of the dome has led to an impressive restoration and reinforcement work that was done in the entire chapel and stabilized it well.
On the rest of the days, the basilica has a guided tour that costs 3 euros and allows entry to places that are usually closed to visitors.