Which is no longer an island: Ostrów Tumski. The time when I was there, a flautist played Bach as I walked the Tumski Bridge. The notes faded into the bricks and stonework of the ancient fanes and houses.
The postcard looks to date from communist- era Poland, maybe 1950s or 60s. The language, not surprisingly, is Polish, and the sender appeared to have forgotten to bring the recipient's address.
Wyspa Tumska is an alternate form of Ostrów Tumski -- Dominsel in German, or Cathedral Island in English.
