We are spending 2 weeks in France. Does anyone know where I can see great mosaics?
Modern?
Paris Just a start on the many
Sacre Coeur: http://www.sacre-coeur-montmartre.com/english/history-and-visit/article/the-apse-mosaic
Space Invader: https://www.telegraph.co.uk/news/2017/08/04/famous-space-invader-mosaics-disappear-paris-streets
Saint-Jean-Bosco; https://www.patrimoine-histoire.fr/Patrimoine/Paris/Paris-Saint-Jean-Bosco.htm
Passages: https://commons.wikimedia.org/wiki/Category:Floor_mosaics_of_Galerie_Vivienne
Where in France do you plan to be?
Paris, Normandy coast, Vichy, Provence, Strasbourg, and Nice.
That's too much territory...you should concentrate on Paris.
In 2015 we saw some interesting mosaics on the lowest floor of the Louvre. I believe they were Persian, or perhaps older.
There are some ancient Roman mosaics in the museums at Orange and Vaison la Romaine, and maybe Uzes, if that's what you're after. All in Provence.
You do realize that mosaics are more closely associated with the Romans, Greeks, and the Med area? The best mosaics will be in museums like the Louvre. Now exactly where will you be in France?