'I' is for 'Inn'!
Coincidentally, after receiving a viewcard of Riquewihr, Alsace from a French postcrosser, I got this card from Alienne for the Alphabet RR. I believe this signboard is of an inn/restaurant in Riquewihr, Alsace, which is arguably the best restaurant there!
Do you know that there is an Inn Sign Society in the UK? People do have diverse interests! This society consists of persons interested in discovering information about inn signs and pub names (collectively referred to as "inn-signia"). For example, they explore and research the origins of various names: How were the names derived? What are their stories? Who were the people the signs portray? What do the odd names mean?
Once upon a time, the name of an inn can reveal something about its past with hints or clues as to its history. Nowadays, most businesses erected signs just to advertise their trade.
In any event, if you are interested in the same thing, I am sure you can't travel anywhere without keeping one eye peeled for a good inn sign. And take memorable photos of it! :)