Additional Note: In HTTP/1.1, even though the web browser connects to the same IP address and port, to many web-servers, there is a slight difference between localhost and 127.0.0.1. Depending what is in the address bar, your browser will send a request header field with either Host: localhost or Host: 127.0.0.1 in it.
Washington DC Museum Free Days. Most Washington, DC museums are Free seven days a week. Crowds and parking are always an issue in the Capitol, so some planning and patience will make your visit more enjoyable. Also, see transportation and parking info below the list.
($613.5 million USD in 2010). 1  It is noted for being the first federal cultural institution in the United States established in 1800 A.D. 2  Located in Washington, DC it has a collections of over 15 million items.  The library only caters to members of United States Congress and does not circulate publicly.