Other facets of the project include an expansion of the Hirshhorn contemporary art museum, underground and overground links between museums, and major building repairs.
The so-called Master Plan, drawn up by the Danish international architectural firm Bjarke Ingels Group, is subject to approval by the National Capital Planning Commission, a federal agency.
"The proposed Master Plan will be implemented over a 10-to-20–year period beginning in 2016," the Smithsonian said in a statement that estimated the total cost at $2 billion.
Funding would come from public and private sources, it said.
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The so-called Master Plan, drawn up by the Danish international architectural firm Bjarke Ingels Group, is subject to approval by the National Capital Planning Commission, a federal agency.
"The proposed Master Plan will be implemented over a 10-to-20–year period beginning in 2016," the Smithsonian said in a statement that estimated the total cost at $2 billion.
Funding would come from public and private sources, it said.
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