what is the first floor of a building
Storey In English, the principal floor or main floor of a house is the floor that contains the chief apartments; it is usually the ground floor, or the floor above. In Italy the main floor of a home is usually above the ground level, and may be called the piano nobile ("noble floor").
White House On Saturday, November 1, 1800, John Adams became the first president to take residence in the building.[17] During Adams' second day in the house, he wrote a letter to his wife Abigail, containing a prayer for the house. Adams wrote: