The Baltimore and Ohio Railroad was one of the oldest, largest, most important railroads in the history of the mid-Atlantic region. During its peak years, the railroad carried coal, steel, and other freight, as well as passengers to New York City, Chicago. The B&O provided critical logistic support to the Union during the Civil War, when it was the target of repeated Confederate raids. B&O Museum possesses the oldest, most historic and most comprehensive American railroad collections in the world. Dating from the beginning of American railroading, the collection contains locomotives and rolling stock, historic buildings, and small objects, document the impact of the Baltimore & Ohio Railroad (B&O) on the growth and development of early railroading and cover almost every aspect of an industry that left a permanent mark on the folklore and culture of America. The Museumís locomotive and rolling stock collection contains many unique examples of historically significant pieces from railroads and includes the finest collection of 19th century steam locomotives. The Museumís roster of locomotives and rolling stock represent the first, last, best or only of their kind in existence today, it has both originals and replicas of many wonderful exhibits.