This is the first ever guide written to provide a detailed insight into the Romanesque churches in the Vall de Boí, one of the most outs- tanding medieval monumental ensembles in Europe, which was awarded World Heritage status in the year 2000. The guide features updated information based on current research and has been designed to make the visit to the churches in the valley a pleasurable and culturally enriching experience. The reader will also find everything they need to know about the frescos and images from these churches that are on display at the Museu Nacional d´Art de Catalunya, to provide them with a complete overview of this extraordinary artistic legacy.