The church of Saint-Germain des-Prés, the construction of which was supported by the first Capetians, is a major building for understanding the invention of novel art at the beginning of the century. Although the porch turf was probably raised by the MORARD abbé (990-1014), the extent of the work then started remains uncertain. The question arises in particular for the other parts of the building attributed to the 10th century and heavily reshuffled to the xviia and the 19th century, be it the chap...