Tunnel Between SIB and A&I Constructed

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An underground tunnel is constructed from the northwest pavilion of the Arts and Industries Building to the East Wing of the Smithsonian Institution Building. The primary reason for the tunnel was the need for heating pipes, electrical conduits, etc. to go between the two buildings because of changes in the heating plant. This was taken advantage of and the tunnel was constructed to also serve as a passage way for individuals, being 70 feet long, 5 feet wide, and 7 feet tall. It has proved convenient in stormy weather, and has served the small watch force at night with a means of communication between the two buildings.


  • Arts and Industries Building)
  • Smithsonian Institution Building (Washington, D.C.)
  • United States National Museum


Chronology of Smithsonian History


United States National Museum Annual Report for the Year 1903. Washington: Government Printing Office, 1905, p. 257.

Contact information

Institutional History Division, Smithsonian Institution Archives, 600 Maryland Avenue, S.W., Washington, D.C. 20024-2520, SIHistory@si.edu




  • Architecture
  • Heating
  • Watchmen
  • Tunnels
  • Building

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