MYSTIC
The Thomas Viaduct
Halethorpe, United States
Commenced, July 4th, 1833. Finished July 4th, 1835. <br><br> Johnathan Knight, Chief Engineer, Caspar W. Wever, Superintendent of Construction. Designed by Benjamin H. Latrobe. Built by John McCartney of Ohio. <br><br>(Other two sides of the monument list company directors.)