In Progress: Tate Modern Expansion / Herzog & de Meuron,© Peter Saville, Hayes Davidson, and Herzog & de Meuron

In Progress: Tate Modern Expansion / Herzog & de Meuron,© Herzog & de Meuron

In Progress: Tate Modern Expansion / Herzog & de Meuron,Model being displayed at the Tate Modern, photo by ArchDaily

In Progress: Tate Modern Expansion / Herzog & de Meuron,Facade model being displayed at the Tate Modern, photo by ArchDaily

In Progress: Tate Modern Expansion / Herzog & de Meuron,© Herzog & de Meuron

In Progress: Tate Modern Expansion / Herzog & de Meuron,© Hayes Davidson and Herzog & de Meuron

In Progress: Tate Modern Expansion / Herzog & de Meuron

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In Progress: Tate Modern Expansion / Herzog & de Meuron