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San Marino's constitution dates from 1600 - the oldest still in force

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A tiny republic on an Italian mountaintop has been governed by the same written statutes for more than four centuries.

Verified · Consulate of San Marino to the UK

The Republic of San Marino traces its constitution to the Statutes of 1600 (the Leges Statutae Republicae Sancti Marini), a compilation in six books of Latin that codified rules of government and justice already developing since the 13th century. Britannica notes that the San Marino constitution “originating from the Statutes of 1600 provides for a parliamentary form of government.”

Those statutes remain in effect today, making them the oldest written constitutional document still in force in any sovereign state.

The system they describe still runs the country. Two Captains Regent, chosen every six months, jointly serve as heads of state, while a Great and General Council of 60 elected members makes the laws. San Marino, founded by tradition in 301 CE, is also widely called the world’s oldest surviving republic.

1600
year the Statutes were promulgated
6 months
term of each Captain Regent
60
members of the Great and General Council

Sources & references

2 references

Well-established. Corroborated by 2 independent sources.

1 Consulate of San Marino to the UK government “The first written constitution was promulgated, the Leges Statutae Republicae Sancti Marini, which continues to remain at the bottom of the sources of San Marino Law.” consolatosanmarino.uk ↗
2 Encyclopædia Britannica Encyclopedia “The San Marino constitution, originating from the Statutes of 1600, provides for a parliamentary form of government.” britannica.com ↗
✓ Last reviewed Jun 6, 2026

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