Piet Fluwijn en Bolleke was a Belgian gag-a-day comic strip series drawn by Marc Sleen from 1944 until 1965.

[1] [2] Piet Fluwijn en Bolleke was a classic family comic strip, drawn by Sleen.

The series was inspired by the German gag-a-day comic Vater und Sohn by Erich Ohser.

[5] From April 3, 1947 on the series was also published in 't Kapoentje, the weekly youth supplement of the newspaper Het Volk, where the character was named "Bolletje".

They were also translated into French and published in Le Petit Luron, the weekly youth supplement of the magazine Samedi, under the name Miche et Celestin Radis.

[13] In 1971 Herman De Coninck and Piet Piryns interviewed Marc Sleen for the magazine Humo.