What year does  the current version of the Constitution whose creation was sponsored by Justo José de Urquiz date from?
Battle of Caseros The Battle of Caseros was fought near the town of Caseros, Buenos Aires Province, Argentina, on 3 February 1852, between the Army of Buenos Aires commanded by Juan Manuel de Rosas and the Grand Army ("Ejército Grande") led by Justo José de Urquiza. The forces of Urquiza, "caudillo" and governor of Entre Ríos, defeated Rosas, who fled to the United Kingdom. This defeat marked a sharp division in the history of Argentina. As provisional Director of the Argentine Confederation, Urquiza sponsored the creation of the Constitution in 1853, and became the first constitutional President of Argentina in 1854.
Constitutional Convention of Puerto Rico On June 8, 1950, the United States government approved Public Law 600, authorizing Puerto Rico to draft its own constitution in 1951. The Constitutional Assembly met for a period of several months between 1951 and 1952 in which the document was written. The framers had to follow only two basic requirements established under Public Law 600. The first was the document must establish a republican form of government for the island. The second was the inclusion of a Bill of Rights.