general history of how it's evolved publicly, decriminalization and celebrations spurred from that (if applicable), public openness, milestones in media, etc. I assume, anyway.

Similar to suffragette-focused museums in terms of topic areas i reckon.

Edit: It's more constructive to downvote unhelpful answers and upvote the original question to help spread awareness of helpful answers, but whatever.

Exactly what it sounds like.

A museum about queer folk