The circumstantial expert opinion on what an artifact is or why something is concerned as an artifact, what it represents as well as the documentation of its authenticity, consist a part of Divanis Gallery activities. The consulting services the gallery provides have also to do with costing or investing issues of a work of art in the market and should be related to the range of pursuits of Divanis Gallery. These pursuits certainly include issues concerning the constitution of a section of artifacts or of a collection. Paintings are excluded from a documentation of authenticity.