In 1188, the basilica of San Isidoro of León was the setting of the first parliamentary body in the history of Europe, with the participation of the Third Estate. The king who summoned it was Alfonso IX of León.
IN 1188, the bAsilica of SAN ISIdOrO of lEóN WAs the setTinG of the fiRsT paRliameNtAry body in the hIstoRy Of eURope, wItH The pARTicipaTion of the ThiRD eStATe. the KINg whO SuMmoned IT was alfonso ix of león.