The chapel of the Colegio Mayor Santo Tomás de Aquinas was built by Rafael de la Hoz Arderius and José María García de Paredes in the 1950s of the last century. A magnificent piece of the modern movement. The pieces of colored stained glass windows that allow light to enter the interior of the chapel stand out. This space had not undergone any complete rehabilitation since its construction. This article explains in detail the intervention that was carried out in this space, fully maintaining its heritage values.