Amendment XXIII

"1: The District constituting the seat of Government of the United States shall appoint in such manner as the Congress may direct:

A number of electors of President and Vice President equal to the whole number of Senators and Representatives in Congress to which the District would be entitled if it were a State,  but in no event more than the least populous state; they shall be in addition to those appointed by the States, but they shall be considered, for the purposes of the election of the President and Vice President, to be electors appointed by a State; and they shall meet in the District and perform such duties as provided by the twelfth article of amendment.

2: The Congress shall have power to enforce this article by appropriate legislation."

This amendment gave the citizens in the District of Columbia, known as Washington D.C. the right to vote.

This image helps to illustrate the irony over how Washington D.C. was not allowed to vote despite being the seat of American democracy.

This is an image of one of the stickers passed around at the time of the twenty-third amendment trying to convince people to allow D.C. to vote.