[3][2] In 1965, he hosted his first exhibition of Pop Art at the gallery with works by Roy Lichtenstein, Robert Rauschenberg, Andy Warhol, Tom Wesselmann, Claes Oldenburg and Jasper Johns.

In the 1980s, Bischofberger championed key figures of the nascent Neo-Expressionist movements, such as Miquel Barceló, Jean-Michel Basquiat, Mike Bidlo, George Condo, Francesco Clemente, Enzo Cucchi, Dokoupil, Samuel Spieler, Peter Halley, David Salle and Julian Schnabel.

Instead of showing works from the respective exhibitions, the advertisements have featured photographic scenes of traditional Swiss life.

In 2018 the artist Peter Fischli joined with Hilar Stadler, curator of the Museum im Bellpark in Kriens, to stage an exhibition dedicated to these back covers.

The latter subsequently proposed a pricing scheme for commissioned portraits with standardized dimensions for clients of the gallery, which would become Warhol's main source of income over the next few years.

[3] Bischofberger came across Basquiat's work for the first time in 1981 and one year later became his main art dealer worldwide until the artist's death in 1988.