On February 17, 2003 the Iron Structure of the 1884 Baldwin Roundhouse at the B&O Railroad Museum, Baltimore, MD, collapsed under the weight of a record-breaking 3 foot snowfall. The Roundhouse is a 22-sided polygon and is the largest circular industrial building in the world. Designed by E. Frances Baldwin, the Roundhouse was completed in 1884. Throughout the restoration process, crews have worked to completely rebuild the lower roof, clerestory roof and lantern while preserving the original design of the building. The museum re-opened in November, 2004. <a href=””>Click to visit.</a>