which formed the foundation of the system of civil law in Argentina. It was written by Dalmacio Vélez Sársfield, as the culmination of a series of attempts to codify civil law in Argentina. The original code was approved on September 25, 1869, by the passage of , and became active on January 1, 1871. With numerous subsequent modifications, it continued to be the foundation of Argentine civil law ("Derecho civil argentino") for more than a century. On 1 August 2015, the Civil Code of Argentina was replaced by a new Civil and Commercial Code - "Código Civil y Comercial de la Nación".