Smithsonian National Zoological Park
The National Zoo was created by an Act of Congress in 1889 for “the advancement of science and the instruction and recreation of the people.” In 1890 it became a part of the Smithsonian Institution. Three well-known people planned the Zoo: Samuel Langley, third Secretary of the Smithsonian; William T. Hornaday, a conservationist and head of the Smithsonian's vertebrate division; and Frederick Law Olmsted, a landscape architect. They designed a new zoo to show animals for the public and to serve as a refuge for wildlife, such as bison and beaver, which were rapidly vanishing from North America.