How did Daniel Burnham and John Wellborn Root divide responsibilities in their architectural partnership?

In their highly successful architectural partnership, Daniel Burnham and John Wellborn Root maintained a complementary division of labor that allowed them to manage a large volume of work efficiently.12

• John Wellborn Root: As the firm’s chief designing partner, Root was primarily responsible for the architectural design of their projects. He possessed the technical ability to successfully execute the concepts that Burnham initiated.13
• Daniel Burnham: Burnham focused on the business and organizational aspects of the firm. He planned the layout of building interiors, organized the office for maximum efficiency, and served as the primary contact for clients. Burnham was known for his powerful personality, which inspired confidence in clients, and he would often produce rapid sketches that Root would later elaborate upon with great care.1

This partnership was defined by their close professional and personal relationship, which enabled them to complete nearly 300 structures during their 18-year collaboration.1