A part of the National Numismatic Collection is accessible online through NMAH's online catalog. The National Numismatic Collection is at the moment working to build digitization initiatives in an effort to make the collection more accessible for the public. Congress authorizes a different class of currency, called “United States notes,” https://banknotes-museum02223.vidublog.com/27493331/rumored-buzz-on-banknotes-of-500-hrwvnias