The Constitution of the Republic of San Marino (also called the Constitution of the Most Serene Republic of San Marino) is distributed over a number of legislative instruments of which the most significant are the Statutes of 1600 and the Declaration of Citizen Rights of 1974 as amended in 2002. The constitutional system has influences from the Corpus Juris Civilis and Roman customary law. It may be the oldest surviving constitution of any sovereign state in the world.