Visiting Seattle, anything to see related to the Sonics?

Hey guys, Celtics fan here. I'll be visiting Seattle for the first time in early June and I was wondering if there's anything in the city that commemorates the Sonics. My first time ever watching the NBA was the 1996 Finals, so obviously I have some nostalgia for you guys. Also, Isaiah Thomas and Avery Bradley are my favorite players on the Celtics, so I hear a lot of good things about Washington and I've also heard that a few of you support the Celtics because of them. Therefore, if possible, I'd like to show mutual respect and find something to learn more about the Sonics franchise and history or at least take a photo or something. Does the Museum of Industry and History still have the championship trophy and banner on display? Is there anything else to see?

I'm hoping you guys get a franchise soon! Thanks!