Boston's Free Baptist Church organized in 1839 on a principle that set it apart from most established congregations in the city: no member would pay for a pew. Nearly every other Protestant church in Boston funded itself by renting family pews, a system that priced out working people, and by refusing it the new congregation drew a broader membership than its neighbors, including many Black worshippers, a mix the church is remembered for as among the first integrated congregations in the country.
In 1843 the congregation bought the Tremont Theatre, a Greek Revival playhouse built in 1827, converting it into a permanent home and renaming both building and church Tremont Temple. That theater heritage suited a second purpose beyond worship: a preferred venue for public lectures, which abolitionist speakers used accordingly. On December 3, 1860, Frederick Douglass was set to address a meeting on John Brown when a mob, joined by city police and reportedly encouraged by Boston's mayor, stormed the hall and dragged him from the podium, an assault that drew wider attention to the anti-slavery cause than the meeting itself would have.
Two years later Tremont Temple hosted a different scene. On January 1, 1863, an overnight crowd of abolitionists filled the hall awaiting word that Lincoln had signed the Emancipation Proclamation. Word did not arrive by telegraph until nearly eight that evening, and when Charles W. Slack read the document aloud, the room erupted, tossing hats and singing, while Douglass spoke twice more before the crowd left at midnight.
Fire claimed the building three times, in 1852, 1879 and 1893, and today's Renaissance Revival structure, designed by Clarence Blackall, opened in 1896. The congregation continues there, granted Boston landmark status in 2023.