The artwork inside the church include the famous mural paintings by the Master of Taüll (contained in the different apses and the keys of the arches), as well as the wooden altar frontal.

The most famous fresco, of Christ in Majesty in the main apse of the church, has been moved to the Museu Nacional d'Art de Catalunya in Barcelona.

Sant Climent de Taüll was devoted to and consecrated by Guillem Ramon, Bishop of Roda-Barbastro.

Sant Climent de Taüll is a Romanesque-style church greatly influenced by the Lombard style, which can be seen through its exterior decoration.

The artwork in Sant Climent de Taüll was important in bringing the art into the public atmosphere.

The altar-frontal was created by a native Catalan artist, possibly in a workshop in La Seo de Urgel.

[3] Sant Climent de Taüll is the largest, most well preserved, and has the most outstanding architecture out of all the churches in the Valley of Boí.

In the south corner of the church there is a tall, slim bell tower that has a square plan with a prism-shaped roof.

This document is painted with white letters on red and black background and is now preserved in the National Museum of Catalan Art.

In the early twentieth century, the National Art Museum of Catalonia in Barcelona took the mural paintings inside the church to protect and preserve them.

The pigment is mixed with water on a small layer of wet lime mortar or plaster, where it is later absorbed.

The four side divisions contain a blind arcade of three arches, where there are figures located directly underneath.

The arches are formed from tall capitals, which are supported by slim colonnettes with torus molding, as well as a high base.

It is also best recognized by its massive size, thick walls, round arches, sturdy piers, groin vaults, large towers and decorative arcading.

This is very characteristic of the mural painting located on the central apse in Sant Climent de Taüll.

The faces of the figures in the bottom half of the mural painting is similar to Christ in the mandorla, except they wear different coloured robes.

Similar to early Christian architecture, Sant Climent de Taüll has a central nave and an apse.

The difference is that Sant Climent de Taüll has three naves and three apses, and a bell tower, whereas early Christian architecture has side aisles, transepts, a narthex and an atrium.

In addition, the Santa Maria Maggiore, a basilica in Rome, has a clerestory, whereas the Sant Climent de Taüll is the opposite because it has very few windows.

In the lower part of the second triumphal arch appears a figure of the Agnus Dei contained in a circle with a blue background.

On the left side of the same arc, there are scenes of Lazarus, who expresses grief while a dog licks his wounds at the door of a rich man.

The church has a wooden altar frontal, which is similar to the mural painting in the central apse, because it consists of Christ in a mandorla surrounded by the four tetramorphs.