Jan Boeckhorst or Johann Bockhorst (c. 1604 – 21 April 1668), was a German-born Flemish Baroque painter and draughtsman. He was a versatile artist who produced history paintings, genre scenes and portraits in a style influenced by the trio of leading Baroque painters in Antwerp Peter Paul Rubens, Anthony van Dyck and Jacob Jordaens.
Jan Boeckhorst was born in Münster, Westphalia as the second oldest of twelve children. His family belonged to Münster’s highly respected citizens (Honoratioren) and his father Heinrich was for a while the mayor of Münster. Jan Boeckhorst became a canon in the Jesuit order at age 17. He only started his artistic study when he was about twenty-two years of age.
In the mid 1620s Boeckhorst moved to Antwerp apparently to study with Peter Paul Rubens. There is no firm evidence that Boeckhorst actually studied under Rubens, only a statement by Rubens’ nephew Philip to that effect. However, a close relationship between the artists during the 1630s is documented. Boeckhorst likely also briefly trained with Jordaens during Rubens' stay in London in the late 1620s. In Antwerp, Boeckhorst was known as Lange Jan (Tall John) because of his tall stature.
From 1626 to 1635 Boeckhorst worked on a commission paid for by the devout merchant Lodewijk De Roomer to complete 26 works for a chapel in the Falcon monastery in central Antwerp (or for St. Joseph’s chapel in the Antwerp convent of St. Augustine). These works on which he collaborated with Jan Wildens are now lost. Between 1627 and 1632 he likely worked closely with Anthony van Dyck who was during that period back in Antwerp after a long stay abroad. The two artists collaborated on individual works of art while Boeckhorst also produced copies after van Dyck.
Jan Boeckhorst became a master in the Antwerp Guild of Saint Luke in 1633-1634. He was a regular collaborator with Rubens in the mid 1630s. He first worked on the decorations for the 1635 Joyous Entry (the so-called 'Pompa Introitus') into Antwerp of the new governor of the Habsburg Netherlands Cardinal-Infante Ferdinand. Rubens was in overall charge of this project. For the Pompa Introitus Broeckhorst contributed architectural elements on the 'Arch of Isabella' and the figures of 'Securitas' and 'Salus publica' in collaboration with Gerard Seghers and Jan Borchgraef.