The first and best place to find photos is within the sources you’ve already used. Those photos are likely relevant to building background, come from the event themselves, and may demonstrate the significance of the stand you’re illustrating.
Also, don’t just limit this to pictures. Photos could be of documents, newspapers, artifacts, or anything useful to tell the story of your stand.
Exhibits and Websites could use anywhere between 10-16 high-quality photos. How they’re used will be discussed later. It’s always better to have more, so shoot for 20-25 really good photos. Documentaries… just start collecting. You need more than any of us can count.
Also, select high-quality photos without watermarks, that are large enough, are not pixelated, and aren’t distorted. Make sure you retain citation information and CITE the photo you’ll use. Save them in a document with the URL and citation info so you can access it later.
Here are a few examples of great sources you can use to find photos: