High Quality Content by WIKIPEDIA articles! The Constitution of Argentina is one of the primary sources of existing law in Argentina. Its first version was written in 1853 by a Constitutional Assembly gathered in Santa Fe, and the doctrinal basis was taken in part from the United States Constitution. It was then reformed in 1860, 1866, 1898, 1949, 1957 (which mainly repealed the 1949 reform), and the present version is the reformed text of 1994.