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Events on Sunday 1 May 1853 1
1853Argentine Constitution of 1853 adoptedFramework for a unified Argentine republicA constituent assembly meeting in Santa Fe adopted the Argentine Constitution on 1 May 1853, establishing a federal republic following decades of civil conflict between unitarians and federalists. The province of Buenos Aires initially refused to join, remaining separate until 1861. The constitution, with amendments, remains the basis of Argentina's government.