It's not nitpicking. 1450 is not between 500 and 1300. You may stress "about" but I certainly didn't.

I put the cut-off at 1300 very intentionally. As soon as you go much past 1300, you start to see stuff like this https://en.wikipedia.org/wiki/Andrei_Rublev#/media/File:Rubl... That's some good shit. I see this in Wikipedia dated 1338: https://en.wikipedia.org/wiki/File:Lorenzetti_amb.effect2.jp... Not bad at all. They're already creeping up on or El Greco or Da Vinci or something.

And if we move the cut-off all the way to 1450, fuhgeddaboudit. You have freaking Albrecht D\:urer by that time. No fair. I'm sorry. The challenge concerned a particular 800-year period, which I chose carefully.

Yes I hear you about the range of quality. You're right. Many of the best pieces may have been "exhibited to death." There was presumably lots of student art and whatnot, probably not considered very good at the time, but it happened to survive. I accept that. But I'm only asking for a single counterexample in an 800-year block of time. I think that's fair.

If you like, though, I'm happy to amend my claim to this: "No, medieval European art did not suck. European art between 500 and 1300 sucked. But from 1300 until whenever the Renaissance starts, watch out. Those folks did some really nice work."