Nine churches with ambulatories (5 completely preserved and 4 partially preserved) have been selected because they form a coherent whole, rich in figured sculptures. They are taken as the basis for this iconographic study of Romanesque sculpture in Auvergne.These sculptures are first analysed in the light of religious texts (the Bible, exegeses of Church Fathers, more contemporary treatises and sermons, etc) and groupedin localised sectors. There follows an in-depth treatment of the most frequently encountered subjects, backed up by examples from the other churches of the region. Finally, the question is raised of relations between the subjects of one given building and a possible overall programme.In the course of these analyses, an explanation has been found for many subjects, an overall programme for the church of St-Nectaire has been brought to light, and possible designers of Notre Dame du Port and St-Nectaire are envisaged. This proposed identification of the designers makes it possible to suggest a review of the generally accepted construction dates.