The aim of this study is to show a range of different examples of mediaeval Catalan wall paintings, especially from the Romanesque period, emphasising their pictorial technique and the particular character created by their geographical situation. This study, as a part of an ongoing PhD research project at the University of Barcelona on the subject, provides a review of data from the few publications available on Catalan wall painting techniques, and from the documentation on the conservation of the wall paintings. -- ICCROM