 The National Building Museum (401 F Street NW), too, is allegedly haunted.Built in 1887 in order to process pensions for Civil War veterans, widows, and orphans (such pensions consumed a quarter of the federal budget at the time), the "Pension Building" (as it was originally known) contains 15 Corinthian columns made of brick and plaster and painted to imitate black onyx.Security guards and other witnesses have claimed that the swirling colors of the columns can change to form the outlines of people who have recently died, or who had ties to the building.