https://www.history.com/this-day-in-history/white-house-cornerstone-laid?cmpid=email-hist-tdih-2020- [login to see] 0&om_rid=
The cornerstone is laid for a presidential residence in the newly designated capital city of Washington, D.C. In 1800, President John Adams became the first president to reside in the executive mansion, which soon became known as the “White House” because its white-gray Virginia freestone contrasted strikingly with the red brick of nearby buildings.