
The US Constitution, which came into effect in 1789, is often considered the oldest national constitution in the world. However, this claim is disputed, as the US Constitution is not the oldest constitution when considering individual US states or non-national constitutions. For example, Massachusetts enacted its state constitution in 1780, and the UK's Magna Carta dates back to 1215. Additionally, the Republic of San Marino's constitution, comprised of six books written in Latin, is believed to have come into effect in 1600. While there is ambiguity in defining what constitutes a constitution, and some scholars argue that San Marino's constitution doesn't qualify, it is nearly 200 years older than the US Constitution.
| Characteristics | Values |
|---|---|
| Oldest written constitution still in use | United States |
| Oldest uncodified constitution | San Marino |
| Oldest codified constitution | United States |
| Second oldest constitution | Poland |
| Third oldest constitution | Switzerland |
| Fourth oldest constitution | Ukraine |
| Fifth oldest constitution | Scotland |
| Oldest constitution in Europe | Poland |
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What You'll Learn

The US Constitution: oldest or not?
The US Constitution, which was established and ratified in 1788, is often considered the oldest national constitution in the world. It is the oldest written constitution still in use today and is considered the governing law of the land in the United States.
However, it is important to note that there are other constitutions that predate the US Constitution. For example, the Constitution of Massachusetts was enacted in 1780, seven years before the US Constitution. Additionally, San Marino's Constitution, which consists of a series of six books written in Latin collectively referred to as the "Statutes of 1600", came into effect in 1600. While some historians and legal scholars abstain from recognizing San Marino's Constitution as the oldest due to its uncodified nature, others argue that its multiple texts do indeed constitute a constitution.
Furthermore, Poland's Constitution of May 3, 1791, is considered the world's second oldest modern constitution and the oldest in Europe. It established a clear division of executive, legislative, and judiciary powers. Other notable old constitutions include those of Luxembourg, with the current version dating back to 1868, and Belgium, which was adopted in 1831.
In summary, while the US Constitution is often regarded as the oldest constitution due to its status as the oldest written constitution still in use, there are other constitutions that are older, such as those of Massachusetts, San Marino, Poland, Luxembourg, and Belgium. The definition of a constitution and the distinction between codified and uncodified constitutions play a role in the ongoing debate about which constitution is the oldest.
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San Marino's constitution
The Constitution of the United States is often regarded as the oldest constitution in the world. However, the Constitution of San Marino, which is nearly 200 years older, predates it. The San Marino constitutional order recognises, guarantees, and enforces the rights and fundamental freedoms set forth by the European Convention for the Protection of Human Rights and Fundamental Freedoms.
The San Marino Constitution is based on the Statuti Comunali (Town Statute), which has been in effect since about 1300. The Statutes form the basis of all laws in effect in San Marino today, and it may be the oldest constitution of any existing nation. The first book of the Statuti Comunali contains 62 articles and is constitutional in nature, describing the various councils of San Marino, courts, and administrative positions, including the Captains-Regent, and their powers. The last two articles explain how the law is to be interpreted and altered, as well as how it is to be promulgated. The second book, Civilium Causarum, contains 75 articles, with the first half dedicated to civil law procedures such as subpoenas, evidence, witness examination, and judicial expenses.
On July 12, 1974, the Captains-Regent signed a law (59/1974) adopted by the Grand and General Council, which included a declaration of citizen rights and the fundamental principles of the juridical order of San Marino. The Declaration begins by repudiating war and asserts the sovereignty of the people, explaining the separation of powers doctrine's applicability to San Marino. It guarantees citizens' rights to equality, inviolability, freedom, and universal suffrage. This law serves as the Republic's fundamental law, according to Jorri Duursma.
The Declaration was amended in 2002, providing additional constitutional detail on the organisation of the government and establishing the Guarantors' Panel on the Constitutionality of Rules, a court responsible for ensuring that laws comply with the Declaration of Rights. The Great and General Council, made up of 60 members, exercises legislative power and controls government policy. The Council members are elected by universal and direct suffrage and hold office until the Council is dissolved or for the reasons indicated in the preceding paragraph.
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Poland's Constitution of 3 May 1791
The US Constitution, ratified in 1788, is often considered the oldest constitution in the world. However, Poland's Constitution of 3 May 1791 is recognised as the world's second oldest modern constitution and the oldest in Europe.
The Constitution of 3 May 1791, also known as the Government Act, was a written constitution for the Polish-Lithuanian Commonwealth. The Commonwealth was a dual monarchy comprising the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania. The new constitution aimed to establish a more effective constitutional monarchy with a clear division of executive, legislative, and judiciary powers. It was influenced by Enlightenment thinkers, including Rousseau's concept of the social contract and Montesquieu's advocacy of a balance of powers among the three branches of government. The constitution also reflected the ideas of the American Constitution, which had gone into force in 1789, but was adapted to Poland's specific circumstances.
The Polish Constitution of 1791 was significant in that it abolished the union of Poland and Lithuania in favour of a unitary state. This change was supported by King Stanisław August Poniatowski and Kołlątaj, but opposed by many Lithuanian deputies. As a compromise, the Grand Duchy of Lithuania was granted privileges guaranteeing its continued existence and equal representation in state-governing bodies. The constitution also set out the role of the military in defending the nation, the King, and the national Constitution.
The Polish Constitution of 3 May 1791 was only in effect for one year due to the Russo-Polish War of 1792. However, its impact was lasting, as it is recognised as the first modern-style political party in Poland's history, and its ideas influenced later constitutions. 3 May is now a Polish national and public holiday, known as Constitution Day (Święto Konstytucji 3 Maja).
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UK's Magna Carta
The US Constitution is often considered the oldest national constitution in the world because, although the Constitution of San Marino is older, not all of it is codified. The Polish Constitution of May 3, 1791, is generally considered the world's second-oldest modern constitution and the oldest in Europe.
However, the US Constitution is not the oldest written constitution still in use. Massachusetts enacted its state constitution in 1780, seven years before the US Constitution was written.
The UK's constitution is largely unwritten but does contain centuries-old texts that predate the US Constitution. One of these is the Magna Carta, which was issued in June 1215 and was the first document to assert in writing that the king and his government were not above the law. It was designed by the barons to protect their rights against the king's power and placed limits on royal authority by establishing law as a power in itself. The charter was reissued in 1216, 1225, 1297, and 1688, with some clauses from the original 1215 charter remaining in force in England and Wales today.
In a 2005 speech, the Lord Chief Justice of England and Wales, Lord Woolf, described the Magna Carta as the "first of a series of instruments that now are recognised as having a special constitutional status". It is still considered a sacred text, and in 2015, the UK celebrated the 800th anniversary of the document with extensive celebrations and discussions.
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US state constitutions
The US Constitution is considered the oldest national constitution still in use today. However, some US states have constitutions that predate it. For instance, Massachusetts' state constitution, which is still in effect, was enacted in 1780, seven years before the US Constitution was written.
In the United States, each state has its own written constitution, which serves as the fundamental blueprint for the state's legal and political organization. These state constitutions are much longer than the US Constitution, which only contains 4,543 words. State constitutions are all longer than 8,000 words because they are more detailed regarding the day-to-day relationships between the government and the people. The shortest is the Constitution of Vermont, adopted in 1793, which is currently 8,295 words long. The longest was Alabama's, sixth constitution, ratified in 1901, with approximately 345,000 words, but it was rewritten in 2022. The average state constitution has been amended about 115 times, with Alabama's being the most amended, with nearly 950 amendments.
State constitutions are often modeled after the federal Constitution, outlining the structure of the state government and typically establishing a bill of rights, an executive branch headed by a governor, a state legislature, and state courts, including a state supreme court. They also provide a general governmental framework for what each branch is supposed to do and how it should go about doing it. Many other provisions may be included, and some states allow amendments to the constitution by initiative.
The Tenth Amendment to the US Constitution (part of the Bill of Rights) states that "The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people." This amendment, along with the Guarantee Clause of Article 4, indicates that states retained the power to adopt their own constitutions when the US Constitution was adopted.
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Frequently asked questions
No, the US Constitution is not the oldest in the world. The Constitution of San Marino, which came into effect on 8 October 1600, is considered older. However, some historians and legal scholars argue that the multiple texts that define the governance and laws of San Marino do not constitute a constitution.
Poland's Constitution of 3 May 1791 is generally considered the oldest in Europe.
The US Constitution is considered the oldest written constitution still in use today.
Massachusetts enacted its state constitution in 1780, seven years before the US Constitution was written.
Thomas Jefferson said the constitution should ideally be rewritten every 20 years. However, the US Constitution has endured due to the country's continuous government. Since 1775 (or 1789), almost every nation on earth has been conquered or undergone a revolution, leading to new constitutions. The US Civil War was an exception, preserving constitutional rule.

























