Flag of Gdansk (Free City of Gdansk)

Flag graphics are welcome. But please provide a link to www.flags-and-anthems.com as the source.

Background knowledge

The Gdansk flag is red. On the left side it shows two white crosses, above which a golden crown is depicted.

This flag was used by the Free City of Gdansk from 1920 - 1939.it has been in use since 1457.