A Dutchman has been sentenced to 30 days in jail under a rarely enforced 19th century law for intentionally insulting King Willem-Alexander, according to a court ruling published on Thursday.

The 44-year-old man from the city of Kampen, whose name was not released, had posted a message on his Facebook page in April 2015 calling the king a murderer, rapist, “oppressor” and thief.