Paris's cultural institutions face a challenging period, as the "Dynastic Jewels" exhibition opens at the Hôtel de la Marine while the Louvre Museum confronts the aftermath of a major jewel heist last month.Art detective Arthur Brand noted the Louvre heist has heightened vigilance, with the exhibition venue implementing modern security measures, including windowless display galleries.The Louvre itself plans 100 new surveillance cameras and a price increase for non-European visitors, and its staff will begin an open-ended strike next week over working conditions.