Inside Sant Climent de Taüll three naves are separated by three cylindrical columns. The columns are made of amalgamated stone, which support the arcades, and the roof of the church has wooden beams. The first column on the north side of the church near the apse was found to have the inscription of the consecration of the church. This document is painted with white letters on red and black background and is now preserved in the National Museum of Catalan Art. The interior of the church (the walls of the naves, apses and columns) were originally covered with polychrome decoration. 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. An exact replica of the mural painting on the central apse was made in place of the original. However, the original mural painting on the northern apse can only be seen in the National Art Museum of Catalonia. The removal of the mural paintings was done by applying horsehide glue. The hardened glue was then peeled off, carrying the pigments of the mural with it.