Smithsonian Police is a national labor union of law enforcement officers and agents. Smithsonian Police The Smithsonian Institution Office of Protection Services is the guard force of the Smithsonian Institution. It is a federal guard force consisting of 850 officers with very limited special police authority tasked with protecting visitors, staff, property, and grounds of the federally owned and managed Smithsonian Institution museums and research centers in Washington, D.C., New York City, at the 2,800 acre Smithsonian Environmental Research Center in Maryland as well as oversight of the security operations at the Smithsonian Tropical Research Institute in Panama. According to a 1978
Smithsonian Institution in early bilateral scientific exchanges with the Academy of Sciences of Cuba. The Smithsonian Institution Building ("the Castle") began construction in 1849. Designed by architect James Renwick Jr., its interiors were completed by general contractor Gilbert Cameron. The building opened in 1855. The Smithsonian's first expansion came with construction of the Arts and Industries Building in 1881. Congress had promised to build a new structure for the museum if the 1876 Philadelphia Centennial Exposition generated enough income. It did, and the building was designed by architects Adolf Cluss and Paul Schulze, based on original plans developed by Major General Montgomery