The Liberty Series was originally planned to honor six presidents, six famous Americans, and six historic national shrines. The first of the shrines is the 1.5-cent Mount Vernon issue, which was first available at Mount Vernon, Virginia, on February 22, 1956. William K. Shrage of the Bureau of Engraving and Printing designed the stamp working from a photograph made by the Bureau for this purpose. This horizontal stamp features a view of Washington's home facing the Potomac River.
This 1.5-cent stamp was issued to cover the single piece (third-class) rate for non-profit organizations initiated on August 1, 1958. Precancelled Mount Vernon stamps met the 1718-1752e commercial third-class bulk rate until January 1, 1959.
George Washington's brother Lawrence (1718-1752) built Mount Vernon in 1743, naming it for his commander in the British Navy, Admiral Edward Vernon. George Washington inherited it upon his brother’s death in 1752.
Washington loved Mount Vernon as evidenced by a letter he wrote to his friend David Stuart: “I can truly say that I had rather be at Mount Vernon with a friend or two about me than to be attended at the seat of government by the officers of state and the representatives of every power in Europe.” It should not go unnoticed that the 1-cent stamp pictures George Washington and the 1.5-cent stamp features his beloved his home.