The 1836 Greek-revival colossus (each of its 30 36ft-high columns was carved from a single granite block) is decorated as befits a treasury, with golden eagles, ornate balustrades and a two-story Cash Room, constructed with eight types of marble. US currency was printed in the basement from 1863 to 1880. Unfortunately tours of the building have been suspended, but the website offers a virtual tour under Education.
This building no longer prints any money, but is often confused with the present 'money factory,' the Bureau of Printing & Engraving, south of the Mall.