is an exhibition re-evaluating the most iconic images of the past 100 years. With more than 300 prints on display, this show can feel unwieldy – but their sheer quality makes it worth a visit.

A local icon. A symbol of San Francisco politics. A Speaker emerita. A matriarch. A badass. So when retired Chronicle librarian Bill Van Niekerken found 1972 photos of the former Speaker of the House ...