When the United States Constitution was adopted on September 15, 1787, Article 1, Section 8, Clause 17, included language authorizing the establishment of a federal district. This district was not to exceed 10 miles square, under the exclusive legislative authority of Congress. On July 16, 1790, Congress authorized President George Washington to choose a permanent site for the capital city and, on December 1, 1800, the capital was moved from Philadelphia to an area along the Potomac River. The census of 1800 showed that the new capital had a population of 14,103.
There have been several forms of appointed and elected governments in the District of Columbia an appointed, three-member commission 1790-1802; elected councils and an appointed mayor 1802-1820 elected councils and an elected mayor 1820-1871 an appointed governor, a two-house legislature , and an elected , non-voting delegate to the Congress 1871-1874 and another appointed, three-member commission 1874-1967.
Oops, I was looking for: Selling Gold in District of ColumbiaSelling Gold in DelawareSelling Gold in Connecticut