Germany: Lindau

Today I got five postcards: four from Germany and one from Singapore.

One of the cards from Germany shows Lindau in Bavaria. Lindau is a city and island in the Lake Constance and was until 1806 a free imperial city. After World War II Lindau was as only Bavarian city part of the French occupation zone. 

I got this card a few weeks ago in an envelope.

Stamp:
Lindau Messenger (issued 07-08-2014)
It is a joint issue with Austria, Liechtenstein and Switzerland.
with a matching special postmark

Thank You very much Eva for sending me the card in a cover!