Texas Constitution art. 5 §1

The judicial power of this State shall be vested in one Supreme Court, in one Court of Criminal Appeals, in Courts of Appeals, in District Courts, in County Courts, in Commissioners Courts, in Courts of Justices of the Peace, and in such other courts as may be provided by law. The Legislature may establish such other courts as it may deem necessary and prescribe the jurisdiction and organization thereof, and may conform the jurisdiction of the district and other inferior courts thereto. (Feb. 15, 1876. Amended Aug. 11, 1891, Nov. 8, 1977, and Nov. 4, 1980.)