The Hansestadt Danzig was a German passenger ship from 1926 to 1939 serving the East Prussian Sea Service for Norddeutscher Lloyd.

The following day, Hansestadt Danzig brought the 2nd Battalion of the 308 Infantry Regiment to Rønne on the Danish island of Bornholm to occupy it as well.

On 9 July 1941, Hansestadt Danzig, together with the minelayers Preussen and Tannenberg, struck a Swedish minefield east of the southern tip of Öland at 56°15′5″N 16°43′5″E / 56.25139°N 16.71806°E / 56.25139; 16.71806 and sank near the village of Gräsgård.

Furthermore, the Swedish Navy had stationed its own minesweeper HSwMS Sandön in front of the minefield to warn incoming ships.

Still in 1941, a memorial stone to the dead of the three minelayers was erected on the south coast of Öland near Össby, which was dedicated in the presence of Crown Prince Gustav VI Adolf and his wife Louise.