Which architectural firm pioneered the concept of 'consistent brand identity' in the early 20th century by establishing a cohesive visual language across all their retail spaces regardless of location?

In the world of architecture, brand identity has evolved significantly over centuries. Major architectural firms often establish their distinctive styles and approaches, becoming recognizable through consistent design elements. This poll explores how famous architectural firms have developed and maintained their brand identity throughout history, influencing both the profession and public perception of architectural design.

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Skidmore, Owings & Merrill (SOM) with their standardized modernist approach for department stores
Peter Behrens' work for AEG, creating unified design language across all retail and industrial spaces
Frank Lloyd Wright's Prairie School designs for retail establishments in Chicago
Louis Sullivan's decorated commercial buildings with their signature ornamental patterns