Jef Geys (29 May 1934 – 12 February 2018) was a Belgian artist born in Leopoldsburg, Belgium.
Geys grew up in Faytlaan, Leopoldsburg and attended school at the Brothers of Love.
He is perhaps best known for his proposal to blow up the Koninklijk Museum voor Schone Kunsten (KMSKA) in Antwerp in 1971 at the end of his solo exhibition held there.
[4] In a letter to the Minister of Culture from November 1970, which was published later in the catalog Ooidonk 78, Geys described his plans about the explosion of the KMSKA as follows: "Departing from the idea that every society, authority, institution, organization, person, etc.
[…] So I would like to start a project, which, if executed, would result in the destruction of the Museum voor Schone Kunsten.