 Camden Street Station was originally built beginning in 1856, continuing until 1865, by the Baltimore and Ohio Railroad as its main passenger terminal and early offices/ headquarters (until 1881) in Baltimore and is one of the longest continuously-operated terminals in the United States.Its upstairs offices were the workplace of famous Civil War era B&O President John Work Garrett (1820–1884).The station and its environs were also the site of several infamous civil strife actions of the 19th century with the Baltimore riot of 1861, on April 18–19, also known as the Pratt Street Riots and later labor strife in the Great Railroad Strike of 1877.