21 July – A fleet from the Hanseatic League has been sent out to attack Copenhagen as a reaction to the Sound Dues but is defeated by a Danish fleet in the Øresund.[4]
1428
16 April – 15 June – Bombardment of Copenhagen (1428): A fleet from the Hanseatic League attacks Copenhagen several times, using canons for the first time in the Nordic countries, but ultimately has to withdraw.[5]
1429
Copenhagen's Goldsmiths' Guild is mentioned for the first time. The town is home to six goldsmiths.[6]