The four surviving copies of Magna Carta have been united in London for the first time.
The document - one of the first steps in the journey towards parliamentary democracy - will go on show at The British Library in central London as part of its 800th anniversary in June this year.
The documents will be at the library for three days before they are taken to the House of Lords for another day, before two are returned to the library and the others go back to their homes at Lincoln and Salisbury Cathedrals.
More than 40,000 people entered a public ballot for the chance to see them with 1,215 winning the opportunity to visit the display.
In a joint statement, the library and the cathedrals said: "King John could surely never have anticipated the enduring global legacy of Magna Carta when he agreed to its terms in 1215.
"Eight hundred years later, the international interest and excitement about this unification event is testament to the extraordinary significance and symbolic power of these four manuscripts.
"We are thrilled to be staging this moment in history together, as partners, at the start of the 800th anniversary year. For each of our institutions, this unique event marks the beginning of our own celebrations in 2015.
"The British Library, Lincoln Cathedral and Salisbury Cathedral will all be staging exhibitions and events later this year to mark the 800th anniversary of the sealing of this iconic document."
- What is Magna Carta?
Magna Carta is an 800-year-old document containing the idea that no-one is above the law, and it still forms the foundation of many modern ideas and documents today.
- What does Magna Carta mean?
It means "Great Charter" in Latin. In fact the whole document is in Latin.
- When and where was Magna Carta granted?
Magna Carta was first drawn up in 1215, granted by King John on June 15 at Runnymede near the River Thames in Surrey.
A different version (the one we draw from today) was reissued by John's son, Henry III, 10 years later in 1225.
Magna Carta was finally enrolled on the statute book (meaning it became part of English law) by Edward I in 1297.
- How many of the original Magna Carta documents survive?
King John sent copies of the first Magna Carta across his kingdom - though we are not certain about the actual number. Today only four survive: one in Lincoln Cathedral, one in Salisbury Cathedral, and two in the British Library.
- Why was Magna Carta first written and granted?
Despite what it stands for today, Magna Carta was not written with lofty ideas of justice and liberty in mind. It was originally meant as a peace treaty between King John (of Robin Hood fame) and his barons, with whom he was at war.
The barons had captured London and John found himself in a political mess - he needed a quick get-out solution.
- Did Magna Carta achieve its short-term aims of creating peace?
Not at all - in fact it failed spectacularly. Although John agreed to Magna Carta at first, he quickly became bitter when its terms were forced upon him.
He wrote to the Pope to get it annulled. The Pope actually happened to agree with John (for once), saying Magna Carta was "illegal, unjust, harmful to royal rights and shameful to the English people". He then declared the charter "null and void of all validity for ever".
Full-scale civil war then broke out between John and his barons. It only ended after John's death from illness in 1216.
- Is it true that King John never "signed" Magna Carta?
Yes, at least not in the way we think of signing. Back in the Middle Ages kings never signed their name on documents to pass them into law. Instead John used his Great Seal to authenticate the document.
This subtlety has confused many people over the years. Most recently the Royal Mint has been criticised for the design on its commemorative 800th anniversary £2 coin, which shows John brandishing the document and a quill.
- Why did John's son reissue Magna Carta?
Henry III came to the throne aged just nine. A few days into his reign, important men around the young king issued a new version of Magna Carta to try to regain the barons' support.
When Henry reached 18 years old he reissued a greatly-revised version in his own name. This 1225 document was granted explicitly in return for a tax payment by the whole kingdom.
- How much of Magna Carta is relevant today?
The original Magna Carta had 63 clauses. A third of this text was either cut or rewritten for the 1225 version. Today, only three of the original 63 clauses remain on the statute books.
Of these three survivors one defends the liberties and rights of the English Church, another confirms the liberties and customs of London and other towns, and the third gives all English subjects the right to justice and a fair trial.
There are some very good reasons the other 60 clauses have been dropped. Many are very specific to the Middle Ages - dealing with property ownership, the workings of the justice system, and taxes with no modern equivalent ("scutage" and "socage" anyone?)
Other clauses that we have dispensed with include a law banning fish weirs on rivers, the dismissal of specific individual royal servants, and the standardisation of weights and measures we do not use any more.
- How important is that clause about justice and a fair trial?
It is incredibly important today, but it was buried deep in the original document and made very little splash in 1215. Part of its success is its adaptability to all sorts of situations throughout the centuries.
If you were wondering what the actual text was, here it is (translated into modern English of course):
"No free man shall be seized or imprisoned, or stripped of his rights or possessions, or outlawed or exiled, or deprived of his standing in any other way, nor will we proceed with force against him, or send others to do so, except by the lawful judgement of his equals or by the law of the land. To no-one will we sell, to no-one deny or delay right or justice."
That basically means the law belongs to everyone, not just the powerful. It is the bedrock of our society today.
- When has Magna Carta been used throughout the centuries?
In 1265 - just 40 years after Henry III's final reissuing of Magna Carta - the relationship between the promises made by the king and the granting of taxation paved the way for the first English Parliament.
In the next century, Parliament interpreted Magna Carta as a right to a fair trial for all subjects.
During the Stuart period, and particularly in the English Civil War, Magna Carta was used to restrain the power of monarchs (at a time when monarchs on the continent were supremely powerful).
There are strong influences from Magna Carta in the American Bill of Rights (written in 1791). To this day there is a 1297 copy in the National Archives in Washington DC.
Even more recently, we can see the basic principles of Magna Carta very clearly in the Universal Declaration of Human Rights - penned in 1948 just after the Second World War.
When King John stuck his seal on that parchment eight centuries ago, he could not possibly have known the magnitude of what he was doing.