The Facebook Public Policy Office in Berlin has likely been in overdrive due to the social network’s ongoing conflict with the north German state of Schleswig-Holstein over whether Facebook users should be allowed to use pseudonyms, but staffers in Berlin welcomed U.S. Secretary of State John Kerry Tuesday, and Kerry signed the office’s wall.

The AllFacebook Marketing Conference will also be heading to Germany April 29, in Munich, with the program being held entirely in German. Click here for more information.