From this article in The Telegraph:
In a move designed to remove an embarrassing link to Germany's past Dulmen town council voted to revoke the honour its predecessor once bestowed upon Hitler.
It becomes the latest German town to erase an unwanted memory, with historians estimating that more than 4,000 German towns and cities once granted the Nazi leader honorary citizenship.
I'm curious to know if any official honours (not restricted only to citizenships), awards, or decorations were granted to Hitler outside Germany.