One can spend a long time researching a particular time and place. The following suggestions come from a variety of sources.
Subject encyclopedias, timetables, handbooks and dictionaries - excellent sources to find background information on paintings, animals, costumes, etc. Furthermore, with a variety of subjects and excellent illustrations and photographs, encyclopedias may serve as inspiration.
Research Databases in the Library:
The importance of image resources to creative writers cannot be overemphasized. Images can be used for visual reference and accuracy checks for countless settings, characters, and historical events. They can also be used for inspiration in much the same way as subject encyclopedias.
Library Film Databases
Historical Fiction - How, What, When & Why? https://www.writersandartists.co.uk/writers/advice/645/dedicated-genre-advice/writing-historical-fiction/
Research sources on historical periods, settings, styles of clothing, etc.