When you move to Europe, you learn quickly to prepare for shut down on Sundays. While some major tourist attractions may remain open in larger cities as well as SOME restaurants, everything else excluding churches, is shut down.
This takes some major getting used to and most learn the hard way. Make sure your fridge is prepped before Saturday at noon, otherwise, you'll be dieting for the day. No grocery stores are open, the markets close, bakeries close, as well as all of the stores in the walking platz. The Germans make Sunday a family day and I've grown accustomed to it.
Just consider Europe closed on Sunday.