20 Mott Street (three-story building with double balconies), ca. 1900.

The Baohuanghui (Protect the Emperor Society or the Chinese Empire Reform Association) was founded by exiled Chinese reformer Kang Youwei in 1899 to promote constitutional reform in China (and the return of Guangxu Emperor to power). It became the first and the largest Chinese transnational organization. Various locations on Mott Street housed the New York headquarters of this organization in the first half of the 20th century. In 1902 and 1903 the Baohuanghui used an address at 20 Mott Street to communicate with their members, before moving on to nos 5, 6, 7-9, and 12 Mott in later years.