REFORM - Reformation or Reformation in Latin, a set of events that will result in the division of the christianity Occident between Catholics - exposes the exterior and the interior of the Cathedral Notre-Dame de Lausanne by collecting all the elements at the same time architectural, photographic and graphic. Between Gothic Style and Contemporary Art, this diploma project aims at revealing the new identity that the Cathedral has adopted during these several centuries. Through documentations, photographs, decompositions and artistic gestures, REFORM exposes a new vision of the monument between past and present.