Revealed: the artwork sneaked into a German gallery by an employee – and the story behind it

Technician, 51, who hung his own picture in an exhibition about art world glitches, has been sacked and given a three-year ban

The first picture that greeted visitors to the first-floor exhibition space in Munich's Pinakothek der Moderne gallery on 23 February may not have immediately grabbed their attention.

The 60cm by 120cm artwork was a retro-looking photograph of a family of four, with the background and parts of the faces and bodies roughly painted over in white. It was unassuming compared with the video- and photo-based artworks in the adjacent rooms, but only on closer inspection might visitors have wondered why there was no label giving the artist or the work's title.