On 12th March I got three cards from Germany.
One of them shows Carl Friedrich Gauss. Carl Friedrich Gauss was a German mathematician. He was born in 1777 in Braunschweig and died in 1855 in Göttingen.
I bought this card in a museum in my hometown.
Glücksburg Castle (from set of two) (issued 02-01-2013)
with a special postmark for the 600th anniversary of the Martino-Katharineum, the school Gauss attended