If you are looking for more art collections from France please check https://www.videomuseum.fr/en they encompasses 67 institutions (like Centre Pompidou - Musée national d'art moderne or Musée national Picasso) engaged to standardize the inventory of their collections and presently includes 36 000 artists, 390 000 works and 355 000 images. Very interesting!
Nukomeet is the company which is developing the project. You can find their case study https://nukomeet.com/work/navigart/