
The oldest institution known to the constitution is a topic of debate, with several countries claiming to have the oldest constitution in the world. The United States Constitution, ratified on June 21, 1788, is often considered the oldest written and codified national constitution still in force. However, San Marino's constitution, which dates back to the 1600s, is technically older, but it is not fully codified. Other countries with old constitutions include Poland, with the second-oldest constitution in the world dating back to 1791, and the United Kingdom, which counts the Magna Carta from 1215 as its founding constitutional instrument.
| Characteristics | Values |
|---|---|
| Country | San Marino |
| History | Can be traced back to the 1600s |
| Type of government | Constitutional republic |
| Number of documents | Multiple |
| Date ratified | June 21, 1788 |
| Date amended | 27 times |
| Date of last amendment | 1982 |
| Date of last update | 1982 |
| Date of first 10 amendments | 1791 |
| Number of authors | 39 |
| Date of establishment of country | 301 |
| Number of states | 13 |
| Number of chapters | 11 |
| Number of sections | 89 |
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What You'll Learn
- The United States Constitution is the oldest written and codified national constitution
- San Marino's constitution is the oldest constitution
- Poland's Constitution of 3 May 1791 is the second oldest modern constitution
- Denmark's Constitutional Act of 1849 ended absolute monarchy
- Canada's constitution came into being with the Constitution Act of 1867

The United States Constitution is the oldest written and codified national constitution
The Constitution is a legal document that sets out the fundamental principles and laws that govern a country. It outlines the responsibilities and powers of the government, as well as the rights of citizens. While some countries have constitutions that have evolved over centuries, others have been shaped by war, conflict, and revolutions.
The United States Constitution is often considered the oldest written and codified national constitution. It was ratified on June 21, 1788, after nine of the 13 original states signed it. The Constitution came into effect the following March, and a new government was established. Since then, it has been amended 27 times, with the first ten amendments collectively known as the Bill of Rights. Interestingly, many of the United States' founding fathers, including Thomas Jefferson and John Adams, did not sign the document.
The US Constitution was influenced by the Scottish Enlightenment and the writings of political philosophers such as Hume, Locke, and Montesquieu. It was also shaped by the Magna Carta and English common law. The Constitution of San Marino, which dates back to the 1600s, is technically older. However, it is not codified, meaning it is not a single document but a collection of multiple documents.
The Polish Constitution of May 3, 1791, is considered the second-oldest modern constitution and the oldest in Europe. It aimed to establish a more effective constitutional monarchy with a clear division of executive, legislative, and judiciary powers. Other notable old constitutions include those of Denmark and Switzerland, which were influenced by the US Constitution and came into effect in 1849 and 1848, respectively.
The process of creating and amending constitutions varies across countries. Some, like the United States, have a formal amendment process, while others, like Canada, have faced challenges in amending their constitution, making it an unpopular political topic. Constitutions are living documents that reflect a country's unique history, traditions, and beliefs, and they may evolve as social and political contexts change.
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San Marino's constitution is the oldest constitution
San Marino is considered to have the oldest written constitution in the world, with its Statutes of 1600 still at the core of its constitutional framework. Founded according to myth in 301 AD, San Marino also claims to be the oldest constitutional republic in the world. The country's constitution is uncodified, meaning it is not a single document but is made up of multiple documents, or six Latin and collective books known as the 1600s Statements. The first book contains 62 articles and is constitutional in character, describing the various councils of San Marino, courts, and administrative positions, including the Captains-Regent, and the powers assigned to them. 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, called Civilium Causarum, contains 75 articles, with the first half providing for civil law procedures covering subpoenas, evidence, examination of witnesses, and judicial expenses.
San Marino's constitution has evolved over the centuries, with the most recent amendments in 2019 banning discrimination on the basis of sexual orientation and legalising civil unions for same-sex couples. The country's unique constitutional structure includes a democratically elected legislature, the Grand and General Council, which selects two heads of state, the Captains Regent, every six months. These are chosen from opposing political parties and serve concurrently with equal powers, presiding over several institutions of state, including the Grand and General Council.
Although San Marino's constitution is technically older than that of the United States, the US Constitution is often considered the oldest constitution in the world because not all of San Marino's constitution is codified. The US Constitution, ratified in 1788, was also the first permanent constitution of its kind and has influenced the constitutions of several other countries.
Poland's Constitution of 3 May 1791 is generally considered the world's second-oldest modern constitution and the oldest in Europe. It established a more effective constitutional monarchy with a clear division of executive, legislative, and judiciary powers.
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Poland's Constitution of 3 May 1791 is the second oldest modern constitution
The Constitution is a legal document that sets out the fundamental principles and laws that govern a country. It outlines the responsibilities and powers of the government, as well as the rights of citizens. While some countries have constitutions that have evolved peacefully over time, others have been born out of conflict and revolutions.
Poland's Constitution of 3 May 1791 is considered the second oldest modern constitution in the world, after that of the United States. It was a written constitution for the Polish-Lithuanian Commonwealth, which was a dual monarchy comprising the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania. The constitution was adopted by the Great Sejm, which met between 1788 and 1792, and it was intended to address political questions and reforms following a period of political agitation.
The 1791 Constitution established a more effective constitutional monarchy with a clear division of executive, legislative, and judiciary powers. It introduced political equality between townspeople and nobility, and placed peasants under the government's protection, mitigating the worst abuses of serfdom. The document's official name was Ustawa Rządowa ("Government Act"), and it reflected Enlightenment influences, including Rousseau's concept of the social contract and Montesquieu's advocacy of a balance of powers among the three branches of government.
The Polish Constitution of 3 May 1791 was in force for less than 19 months, as it was declared null and void by the Grodno Sejm in 1793. Despite its short duration, it is considered a revolutionary document in the political history of the world, nurturing the political aspirations of many successive generations of Poland's citizens. It is celebrated as a national holiday in Poland, known as Constitution Day, and it helped sustain Polish and Lithuanian aspirations for the eventual restoration of their sovereignty.
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Denmark's Constitutional Act of 1849 ended absolute monarchy
The US Constitution is often considered the oldest constitution in the world. However, the Constitution of San Marino is technically older, dating back to the 1600s.
Denmark has a system of constitutional monarchy, with the monarch serving as the ceremonial head of the country. This came into effect with the 1849 Constitutional Act of the Kingdom of Denmark, which ended absolute monarchy and limited the powers of the monarch.
Prior to 1849, Denmark was an absolute monarchy, with all the power resting with the king. The king had the power to appoint and dismiss civil servants at will, and his power was only constrained by the Augsburg Confession.
The 1849 Constitutional Act, also known as the June Constitution, established Denmark's first national parliament, the Rigsdag, and divided the power of the state between the king, parliament, and the judiciary. The constitution also gave voting rights to 15% of the Danish population, specifically solvent men over 30 years old who had their own households.
The main principle of the Constitutional Act was to limit the king's power, creating a comparatively weak constitutional monarch who is dependent on ministers for advice and parliament to draft and pass legislation.
The Constitutional Act is the most important piece of legislation in Denmark, and all other laws must comply with it. Since its inception, the constitution has been amended only a few times, with the latest amendment occurring in 1952. The current constitution has 11 chapters and 89 sections.
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Canada's constitution came into being with the Constitution Act of 1867
The Constitution Act of 1867, originally known as the British North America Act, marked the beginning of Canada's constitution. It was enacted by the British Parliament on March 29, 1867, and came into effect on July 1 of the same year. The act created the Dominion of Canada and established the country's legislative independence from the United Kingdom.
The Constitution Act, 1867, outlines the structure of Canada's government and the distribution of powers between the central Parliament and the provincial legislatures. It recognizes Canada as a constitutional monarchy and a federal state, similar in principle to the unwritten constitution of the United Kingdom. The act also outlines the legal foundations of Canadian federalism and provides for a constitution that places substantive limits on government action.
While the Constitution Act, 1867, is a significant component of Canada's constitution, it does not contain the entire constitution. The Constitution of Canada comprises core written documents and provisions that are constitutionally entrenched, including the Canada Act 1982 (which includes the Constitution Act, 1982), and the acts and orders referred to in its schedule, particularly the Constitution Act, 1867, and any amendments to these documents.
The Canadian constitution has evolved over time, with the most recent amendment occurring in 1982, which included the Canadian Charter of Rights and Freedoms. This charter outlines the civil rights of Canadian citizens and describes the process for amending constitutional laws. The constitution also allows for the Supreme Court of Canada to impose national wage and price controls to combat serious national inflation.
The Constitution Act, 1867, serves as the foundation for analyzing the division of powers between the provinces and the federal government in Canada. It has been endorsed by all provincial governments except Quebec, reflecting the country's diverse history, traditions, and beliefs.
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Frequently asked questions
The Constitution of San Marino is the oldest constitution whose history can be traced back to the 1600s. The country is also the oldest constitutional republic in the world, founded by Marinus in 301.
Poland's Constitution of 3 May 1791 is generally considered the world's second oldest modern constitution and the oldest in Europe.
The United States Constitution is the oldest and longest-standing written and codified national constitution in force in the world. It has been amended 27 times.
The United Kingdom has the oldest existing constitution if you count the Magna Carta from 1215.

























