Boston 400: Themes follows the forces that keep resurfacing throughout the city’s history. Censorship and defiance, disaster and resilience, immigration, invention, activism, performance, nightlife, power and reinvention do not belong to any single century. They move through Boston repeatedly, changing form while carrying traces of what came before.

This is where chronology gives way to the mash-up. Puritan restrictions anticipate Banned in Boston; revolutionary songs lead toward folk, punk and hardcore; the Boston Tea Party becomes a rock club; public disasters expose the systems surrounding them; and old neighborhoods, institutions and familiar names acquire entirely new cultural meanings. The connections are not historical coincidences—they are recurring Boston behaviors.

Drawing from more than two million objects in the David Bieber Archives, each theme brings photographs, recordings, publications, posters, advertisements, artifacts and firsthand documents into conversation across time. Major Motherlode investigations including Banned in Boston, Storm Warning and Boston Babylon live here alongside new thematic exhibits still being uncovered and assembled.

The Timeline asks when something happened. Moments examines what happened and why it mattered. Themes asks why Boston keeps doing it.