Description: [caption id="" align="aligncenter" width="420" caption="From 1897-1903, galleries were built on the second floor of the United States National Museum (USNM), now the Arts and Industries Building (A&I), to provide more exhibit space, Pictured are men beside bricks to be used in the construction of the galleries, c. 1897-1903, by Unidentified photographer, Photographic print,