39°17′08″N 76°38′00″W / 39.285457°N 76.633437°W The Mount Clare Shops is the oldest railroad manufacturing complex in the United States, located in Baltimore, Maryland.[1] It was founded by the Baltimore and Ohio Railroad (B&O) in 1829. Mt. Clare was the site of many inventions and innovations in railroad technology. It is now the site of the B&O Railroad Museum. The museum and Mt. Clare station were designated a National Historic Landmark in 1961.[2]