Like his father, Julius Neubronner was a friend and sponsor of a Kronberg-based group of notable painters known as Kronberger Malerkolonie, whose museum is now located on the first floor of his house.Ausstellungseröffnung in der Streitkirche. kronberger-maler.de. In 1907, he joined the Senckenberg Nature Research SocietyDirektion der Senckenbergischen Naturforschenden Gesellschaft: Bericht der Senckenbergischen Naturforschenden Gesellschaft in Frankfurt am Main 1908.
