Rubuta ci gaba don wannan sakin layi - An rinjayi juyin juya halin 'yanci da ke faruwa a Turai, juyin juya halin' yanci na 1820 ya fara a Porto. 'Yan juyin juya halin sun bukaci dawowar John VI na Fotigal, wanda ya sauya Kotun Fotigal zuwa mulkin mallaka na Fotigal na Brazil tun lokacin da Faransa ta mamaye Fotigal, ya kuma bukaci a kafa masarautar tsarin mulki a Fotigal. A cikin 1822 an yarda da tsarin mulki na sassaucin ra'ayi, a wani ɓangare ta hanyar ƙoƙarin majalisa mai sassaucin ra'ayi na Porto (Junta do Porto). Lokacin da Miguel na Fotigal ya hau gadon sarautar Fotigal a shekara ta 1828, ya yi watsi da wannan kundin tsarin mulki kuma ya yi sarauta a matsayin mai mulkin mallaka, ya fara yakin basasa. Porto ya sake tayar da hankali kuma dole ne ya shiga cikin watanni goma sha takwas tsakanin 1832 da 1833 ta sojojin Miguelist. Bayan saukar sarki Miguel an sake kafa tsarin mulki na sassaucin ra'ayi. Ana kuma kiran Porto "Cidade Invicta" (Ingilishi: Birnin da ba a ci nasara ba) bayan juriyarsa ga sojojin Miguelist a cikin kewaye da Porto. Hargitsi da 'yan jamhuriya suka yi ya haifar da tawaye a Porto a ranar 31 ga Janairu, 1891. Wannan zai haifar da ƙarshe a cikin halittar
na Jamhuriyar Portuguese a 1910.