The Hansa-Brandenburg B.I was an unarmed military reconnaissance biplane of World War I flown by the Austro-Hungarian Air Service.
It was one of the earliest designs of Ernst Heinkel, who was working for Hansa-Brandenburg at the time.

The Aviatik (Berg) DI was the first indigenous fighter aircraft built in Austro-Hungary. Oberingenieur Julius von Berg (hence the name "Berg"), appointed as head designer at the Aviatik company, designed the first prototype late 1916.
Work on the prototype began in August 1916, while the first flight of the Aviatik (Berg) DI prototype, marked 30.14, took place at 16th October 1916 at Aspern, unfortunately killing the test pilot.