El juramento de las Cortes de CAdiz de 1810 (Oath of the Cortes of Cadiz in 1810) by Jose Casado del Alisal (1832?1886). When the Cortes convened in CAdiz in 1810; there appeared to be two possibilities for Spains political future if the French could be driven out. The first written Spanish constitution was promulgated in CAdiz on 19 March 1812. The Constitution of 1812 is regarded as the founding document of liberalism in Spain. 1810