The second Empire style was borrowed from France. It is named for
the reign of Napoleon the III. The mansard roof increased the head room
and light, creating an additional usable floor. Public buildings usually include
classical pediments, balustrades, and windows flanked by columns or
pilasters. Columns are usually paired. Other characteristics include Quoins, belt
course, slate roofs, and window molding. The old city hall in Boston is a classic
example of Second Empire architecture.