Which major architectural firm rebranded in 2015, changing from a founder-focused logo to an abstract geometric symbol to reflect its transition from a personality-driven practice to a collaborative global design firm?

Throughout history, architectural firms have evolved their corporate identities to reflect changing design philosophies and business approaches. This trivia question explores how one of the world's most recognized architectural practices transformed its visual identity to signal a significant shift in its organizational structure and market positioning.

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Foster + Partners
Gensler
SOM (Skidmore, Owings & Merrill)
Zaha Hadid Architects