## Description: Expand the artwork catalogue with more ways to explore and filter artworks. Add filters for time period, medium, country or city, and, where available, culture or art period. Use the artwork data already available in the catalogue, and present the filters as clear, engaging categories such as Time Travel, Materials, and Around the World. ## Done when: - Users can filter artworks by time period, medium, and country or city. - Culture and art period filters appear when that data is available. - Filters can be combined with the existing artist filter and search. - Users can clear all filters and return to the full catalogue. - Missing artwork data does not cause errors or show misleading filter options. - You can have multiple filters open at the same time.