There's a remarkable painting depicting that (Hanseatic-era Visby). I'd always been fascinated by the hats.
https://en.wikipedia.org/wiki/Valdemar_Atterdag_holding_Visb... ("Valdemar Atterdag holding Visby to ransom, 1361")
https://en.wikipedia.org/wiki/Valdemar_Atterdag_holding_Visb... ("Valdemar Atterdag holding Visby to ransom, 1361")