On close terms with art dealers like Bruno and Paul Cassirer, he became a leading figure in the Berlin art scene before World War I.
Max Liebermann was the Berlin Secession's first president, and he proposed to the Secession that Paul Cassirer and his cousin Bruno act as business managers.
In 1903 Christian Morgenstern joined as literary editor and the journal "Das Theater" was founded under his direction.
•
On 2 May 1898 the artists' association Berlin Secession was established with Paul and Bruno as secretaries.
•
In 1898, together with his cousin Paul Cassirer, he opened a gallery and bookshop at 35 Viktoriastraße near Kemperplatz, Berlin.
Bruno Cassirer (1872–1941), German publisher and gallery owner in Berlin
Johanna initially worked closely with German art dealers and publishers Paul Cassirer and his cousin Bruno to organize exhibitions of Van Gogh's paintings in Berlin and in 1914 to publish the first volume of the Letters to Theo.
Cassirer moved to Berlin, and he and his cousin Bruno, while still in their mid 20's, opened their gallery on the ground floor of Paul's house in the up-market Viktoriastrasse.
Bruno Mars | Bruno Maderna | Frank Bruno | Bruno Walter | Bruno Latour | Bruno Schulz | Bruno | San Bruno, California | Paul Cassirer | Bruno Mantovani | Giordano Bruno | Franklin Bruno | Bruno Weil | Bruno Giuranna | Bruno Paul | Bruno Mattei | Bruno Coulais | Bruno Contrada | Bruno Cassirer | Brüno | Ernst Cassirer | Bruno Pontecorvo | Bruno Liljefors | Bruno Grandi | Bruno Bischofberger | Tony Bruno | Saint-Bruno | Saint Bruno | Jimmy Bruno | Bruno Vlahek |