A court in Zwolle has sentenced a 32-year-old man, who was obsessed by the royal family, to three months in jail and psychiatric prison for threatening princess Amalia.

Wouter G was arrested at the end of January and has been remanded in custody since then.

G sent the princess, who is first in line to the throne, messages via Instagram which were of a ‘violent, sexual and frightening’ nature, the court was told during the hearing three weeks ago. A friend of Amalia’s, named as Brent, was also threatened.

G has a history of psychiatric problems and may have schizophrenia, experts said during the hearing. The court decided to sentence G to a maximum of four years of psychiatric prison in an effort to get him to complete a course of treatment.