The cornerstone spent the earliest years of its life at 1600 Pennsylvania Avenue, the home of every president of the United States except George Washington. Although he probably knew he would never have an opportunity to reside there, Washington was instrumental in the design and placement of the president's home in the new nation's capital. Having used Virginia aquia sandstone to construct many of his buildings at Mount Vernon, it is not surprising that the same material was specified for the construction of what would be later called "The White House".

Source: Mount Vernon