A Chinese blue and white 'Rotterdam riot' plate, Chenghua mark, Kangxi Dia.: 20 cm The citizens of the Dutch city of Rotterdam, incensed by a brutally unfair punishment pronounced by their magistrate, ran riot and tore down the magistrate's house. This act was commemorated in a cast medallion from which the plates, also ordered to commemorate the event, were painted. This is the first European historical/political event ever to be produced on Chinese export porcelain.