How did Walter Gropius gain early experience in Peter Behrens’s architectural office?

Walter Gropius joined the architectural office of Peter Behrens in Berlin in 1907, following his studies at technical institutes in Munich and Berlin-Charlottenburg and a year of travel through Italy, Spain, and England.1

His experience in Behrens’s office was instrumental in shaping his career. Gropius specifically noted that his work there, along with the design challenges he undertook for a German electricity company (AEG), helped form his lifelong interest in progressive architecture and the interrelationship of the arts. During this period, Behrens was serving as the artistic adviser for AEG, and the office environment provided Gropius with exposure to significant industrial design projects, including the development of factories and various consumer products. Gropius remained in Behrens’s office until 1910.12