25 million dollars
National Park Service
If you want to build a church building, you get an architect. Many denominations in the United States have building plans available. You can contact their national headquarters. However, those plans may not meet local building codes.
Marble.
In Malaysia, it cost RM20-30K to build a road of 100m in length.
http://www.spiritofmaat.com/archive/feb2/carplans_doc.htm
Freemasons were indeed involved in the architecture, cornerstone-laying and building of Washington, D.C. . There were also many non-Masons who were also part of building this Capitol of The United States.
http://blog.makezine.com/archive/2006/03/diy_highcontrast_baby_mobile.html
George Washington did not build Washington, D.C. It was named after him. It held it's first assembly in 1800.
I think the congress capitol building.
25 years they want to build the Washington monument
The Flatiron Building took 90 balls to build
The Washington National Monument Society asked states to donate stones as a cost-cutting policy to reduce the amount of stones needed to build the Washington Monument. The donated stones were to be fitted into interior walls.