Mortimer Building

[2] The building was used as the general headquarters of the Industrial Workers of the World at its peak between 1912 and 1917.

[3] The New York Stock Exchange acquired the Mortimer Building for $745,000 in December 1918.

Reasons for the acquisition included consolidating all the adjuncts of the exchange beneath one roof and the necessity for additional floor space for foreign issues, entertained by the NYSE.

Modern conveniences included steam gas, electric lights, and two speedy elevators.

This 1862 structure, which held the early offices of the American Institute of Architects, still stands as of 2018.