Joachim Heinrich Wilhelm Wagener

Joachim Heinrich Wilhelm Wagener (16 July 1782 in Berlin – 18 January 1861 in Berlin) was a German banker and patron of the arts. His collection formed the initial nucleus of the Alte Nationalgalerie in Berlin.

Wagener allowed the public to view his collection and commissioned the writing of catalogues.

In his 1859 will, Wagener left a gift to the Prussian Crown of his art collection on the condition that it form the basis for the creation of a national gallery. The donation led to the opening of the National Gallery in Berlin the same year.