An account of the Smithsonian Institution, its founder, building, operations, etc. : prepared from the reports of Prof. Henry to the regents, and other authentic sources (1859)
Rhees, William Jones, 1830-1907 · Washington : Thomas McGill, printer · leaf 19
found immediately anterior to its merging into the early Gothic, and is known as the Norman, the Lombard, or Xlomanesque. The semi-circular arch, stilted, is employed throughout — in doors, windows, and other openings. It is the first edifice in the style of the twelfth century, and of a character… … 58 feet high. NORTH CENTRAL TOWERS.
Smithsonian Institution -- History
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