Portugal: Polity Style: 1815-2023 before 16 Dec 1815 Reino de Portugal [1] 16 Dec 1815 - 26 Feb 1821 Reino Unido de Portugal, e do Brasil, e Algarves 26 Feb 1821 - 3 Jun 1823 Reino-Unido de Portugal, Brasil e Algarve 3 Jun 1823 - 13 May 1825 Reino Unido de Portugal, e do Brasil, e Algarves 13 May 1825 - 31 Jul 1826 Reinos de Portugal e Algarves 31 Jul 1826 - 4 Apr 1838 Reino de Portugal [2][3] 4 Apr 1838 - 10 Feb 1842 Nação Portuguesa 10 Feb 1842 - 5 Oct 1910 Reino de Portugal [2] 5 Oct 1910 - República Portuguesa [4] [1] Also in formal use: Reino de Portugal e Algarves, with occasional grammatical variations. [2] This style is prescribed by the Carta Constitucional, but the polity is there described thus: O seu Território forma o Reino de Portugal e Algarves ... [3] Despite re-establishment, 10 Sep 1836, of the Constitution of 1822, the polity style remains tacitly unaltered. [4] 19 Jan 1919 - 13 Feb 1919 Reino de Portugal (in dissidence) Last updated on: 29 Nov 2023; URL: www.archontology.org/nations/portugal/01_polity.php