"Anyone, whether in public places or gatherings, by utterances, cries or threats, or by any writing, printed matter, pictures or symbols, which are seized, distributed or sold, for sale or displayed before the eyes of the public, is guilty of insulting the person of the King, shall be punished by imprisonment of six months to three years and a fine of 300 to 3,000 francs."
January 1, 1970
https://en.wikiquote.org/wiki/Monarchy_of_Belgium