The Constitution of the State of Texas is the document that establishes the structure and function of the government of the U.S. state of Texas, and enumerates the basic rights of the citizens of Texas.
The current document was adopted on February 15, 1876, and is the seventh constitution in Texas history (including the Mexican constitution). The previous six were adopted in 1827 (while Texas was still part of Mexico and half of the state of Coahuila y Tejas), 1836 (the Constitution of the Republic of Texas), 1845 (upon admission to the United States), 1861 (at the beginning of the American Civil War), 1866 (at the end of the American Civil War), and 1869. As with many state constitutions, it explicitly provides for the separation of powers and incorporates its bill of rights directly into the text of the constitution (as Article I). The bill of rights is considerably lengthier and more detailed than the federal Bill of Rights, and includes some provisions not included in the federal Constitution.