That's the problem - I highly doubt there's an actual CULTURE (size-wise) that could be awarded a FLAG. Even a Google search brings up no such flag, lol. But I did find simply a picture of the person behind Sabbateanism (aka Sabbatai Zevi), so it's the closest to being a flag dedicated to him. As far as FLAGS go, this is probably the closest that CAN get there. I'll look it up more, but so far that's the best result yet.