By far, the German cards I received are very nice :) and certainly this one is. Sanssouci Palace in Potsdam from Rafal, for Different Countries RR.

Origin: Berlin, Germany (8.785km in 8 days)

Stamps: left to right
Leuchttürme - Warnemünde (Lighthouse - Warnemünde), Germany, 2008
50 Jahre Lebenshilfe (50 Years Life Assistance(???)), Germany, 2008