Guardians of the Louvre

Guardians of the Louvre by Jiro Taniguchi, 136 pages.
The protaganist, a Japanese artist who is visiting Paris after attending a Comic convention in Barcelona, falls ill. His fever dreams may be carrying over into his visit to the Louvre several days later, or he could be meeting the secretive guardians, and meeting long-dead artists. It's hard for him to be sure. The art is beautiful and the story is interesting.