Louisiana: Polity Style: 1812-2026

20 Feb 1811	the inhabitants of part of the territory ceded under the name of Louisiana are authorized to form a constitution and state government and to assume a name for the future State, to be admitted to the United States on condition of acceptance of the Constitution of the United States by a State Convention and approval of the State's constitution by Congress, in accordance with an act passed by the Congress of the United States (House of Representatives on 15 Jan 1811, Senate on 7 Feb 1811 with amendments, House disagrees with one of the amendments on 9 Feb 1811, Senate refuses to recede from the amendment on 12 Feb 1811, House concurs in the amendment on 13 Feb 1811) and signed into law on 20 Feb 1811 (Statutes at Large, 2:641-643) [1]
23 Nov 1811	the Constitution of the United States is accepted by a declaration approved at a session of the Convention held at New Orleans on 23 Nov 1811 as required by the Act of the Congress of the United States of 20 Feb 1811 (Louisiana Convention 1811-1812, p. 4)
28 Jan 1812	the Constitution or Form of Government of the State of Louisiana is adopted (Constitution on 22 Jan 1812, Schedule on 27 Jan 1812) at a session of the Convention held at New Orleans and signed on 28 Jan 1812, pending the approval by the Congress of the United States (Louisiana Convention 1811-1812, pp. 15-19) [2]
30 Apr 1812	the Constitution or Form of Government of the State of Louisiana is approved, and Louisiana is admitted to the United States in accordance with an act passed by the Congress of the United States (House of Representatives on 20 Mar 1812; Senate on 1 Apr 1812, with amendments; House concurs in the amendments on 6 Apr 1812) and signed into law on 8 Apr 1812, effective on 30 Apr 1812, the date appointed by the act (Statutes at Large, 2:701-704) [3]
30 Apr 1812 -	State of Louisiana [4]
26 Jan 1861	Louisiana seceded from the United States in accordance with an ordinance passed at a session of the Convention held in Baton Rouge on 26 Jan 1861 (Louisiana Convention 1861, 17-18, 130-131, 230-231) [5]
8 Feb 1861	Louisiana formed part of the Confederate States of America on the date when the Constitution for the Provisional Government of the Confederate States of America was approved by the Congress and came into operation (Confederate Congress Journal, 1:39; Confederate Statutes at Large, pp. 1-8)
25 Jul 1864	the ordinance of secession of 1861 is declared null and void in accordance with a resolution passed at a session of the Constitutional Convention held in New Orleans on 25 Jul 1864 (Louisiana Constitutional Convention Journal 1864, 168-169; Louisiana Constitutional Convention Debates 1864, 620-621) [6]
9 Jul 1868	Louisiana is re-admitted to representation in the Congress of the United States in accordance with an act passed by the Congress of the United States (House of Representatives on 14 May 1868; Senate on 10 Jun 1868 with amendments; the amendments were concurred in by the House on 12 Jun 1868; vetoed by the President of the United States on 25 Jun 1868; the veto was overridden by the House of Representatives and by the Senate on 25 Jun 1868), took effect in Louisiana immediately upon the passage of a resolution approving the Amendment XIV to the Constitution of the Unites States by the General Assembly of the State of Louisiana (Statutes at Large, 15:73, 15:704-705; Louisiana Session Laws, 1868, 3-4) [7]

Full title: An Act to enable the people of the Territory of Orleans to form a constitution and state government, and for the admission of such state into the Union, on an equal footing with the original states, and for other purposes.
The reading and adoption of the Constitution's articles were completed on 22 Jan 1812, and the Convention passed a resolution approving the text. A committee was appointed to consider the Schedule, which was presented to the Convention and adopted on 27 Jan 1812. The signed copy of the Constitution and its official publications in English and French, however, bear the date "Done in Convention, at New-Orleans, [22 Jan 1812]."
Full title: An Act for the admission of the State of Louisiana into the Union, and to extend the laws of the United States to the said state. Unlike other former territories of the United States, the admission of Louisiana into the Union required the formal approval of the state's constitution by Congress.
Also in official use (French): État de la Louisiane.
Full title: An Ordinance to dissolve the union between the State of Louisiana and other States, united with her under the compact entitled "The Constitution of the United States of America."
The resolution of 25 Jul 1864 affected only the territories of the State of Louisiana controlled by the government, supporting the United States.
Full title: An Act to Admit the States of North Carolina, South Carolina, Louisiana, Georgia, Alabama, and Florida, to Representation in Congress.