While I'm sure the German speaking community will have opinions on the design of this and, like me, make assumptions about the owners, I wonder if people elsewhere will just wonder what this is.
So let me tell you. The box is a mailbox, the tube underneath is meant for newspapers. Beside the little buttons on the left are name tags I anonymized. Pushing a button you ring the door bell inside the house. There is a small gate in the fence right beside them.
Without knowing anything about them, I guess the owners of this house are conservative, Catholic Bavarians and whoever bought the mail box is over 70 years old now.