The Washington Monument, Robert Mills architect, Lieutenant Colonel Thomas L. Casey engineer, completed 1884, granite and marble, 169 m high (Washington, D.C.)
speakers: Dr. Beth Harris and Dr. Steven Zucker
source
The Washington Monument, Robert Mills architect, Lieutenant Colonel Thomas L. Casey engineer, completed 1884, granite and marble, 169 m high (Washington, D.C.)
speakers: Dr. Beth Harris and Dr. Steven Zucker
source