Today I got not only four postcards but also two covers from Germany.
Sewin (issued 04-12-2014)
Squirrel (from set of two) (issued 02-01-2015)
Inside were two postcards.
One of them shows some views of Cottbus. Cottbus is the second largest city of Brandenburg and the centre of the Sorbs in the Lower Lusatia.
The other card shows Schwerin. Schwerin is the second largest city of Mecklenburg-Vorpommern and its capital city.
Thank You very much Sieglinde!