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The Rescue: Desperate Measures: Near Rome, the TARDIS, containing the 1st Doctor, Ian, Barbara, and Vicki, materializes and falls off a cliff.

The Romans: The Slave Traders; All Roads Lead to Rome; Conspiracy; Inferno: While resting at a villa near Rome, Barbara and Ian are captured by slave traders. The 1st Doctor and Vicki get caught up in affairs in the court of Nero, the Doctor eventually inspiring Nero to burn Rome. All four manage to escape their predicaments and meet back at the villa.

While these events are considered aprocryphal in our own reality, the date in confirmed by the Doctor.

In Constantinople, the Doctor carves a challenges the ancient evil known as Fenric to solve a chess problem. When Fenric fails, the Doctor is able to trap his essence in a flask, banishing Fenric to the Shadow Dimensions.

"Seventeen centuries" before "The Curse of Fenric" (1943).

The Roman Cult of Demnos is believed to die out at this time, although it will continue on in secret until at least the late 15th century.

"The Masque of Mandragora." Exact date is conjecture. The Doctor says the Cult should have died out in "the 3rd Century."

On Skaro, after an anticipated great rainfall does not come, the group of Thals led by Temmosus leave their plateau in search of a major source of food.

Temmosus says this happened 4 years before "The Daleks" (AD 300). Susan, in the same story, says only two years had passed, however, her information is second hand; Temmosus' statement is more likely to be correct.

On Skaro, the radiation level near a Dalek city is measured at 96 units.

200 days before "The Daleks."

100 000 BC: The Firemaker: The TARDIS, containing the 1st Doctor, Susan, Ian and Barbara, lands on Skaro.

The Daleks: The Dead Planet; The Survivors; The Escape; The Ambush; The Expedition; The Ordeal; The Rescue: On the planet Skaro, the 1st Doctor, Susan, Barbara and Ian encounter the Daleks, and help a group of Thals invade their City and immobilize them.

I am using the date from James Armstrong's chronology. This is to give the Daleks enough time to recover and reach the technology level needed to invade Earth in the 22nd century in "The Dalek Invasion of Earth."

A Zygon spaceship crashes in Loch Ness, Scotland. With them is the half-animal, half-machine Skarasen, a huge creature which over the years will be taken for a "monster" inhabiting the Loch.

"Terror of the Zygons." Exact date is conjecture. Broton simply says that the Zygons arrived "centuries ago." The earliest known mention of a monster in or around Loch Ness dates back to 565, so they came to Earth before that.

St. Columba encounters the Skarasen in Scotland, in what becomes the first of centuries of sightings of the "Loch Ness Monster."

In "Terror of the Zygons," Broton says that there have been sighting of the Monster since the "Middle Ages." This is the first known sighting on record.

On the planet Marinus, the Voord and their leader Yartek overcome the Conscience of Marinus and begin to commit numerous crimes. To avoid the Voord taking control of the Conscience, 4 of its micro-circuits, called Keys, are hidden around the planet.

"The Keys of Marinus." "7 centuries"after the creation of the Conscience (36 BC).

Monarch returns to his home world of Urbanka and leaves for Earth for what will be the last time.

"Four to Doomsday." The final trip back takes 1250 years, taking us up to 1981.

The Doctor, in an incarnation after his 7th, is the wizard Merlin in an alternate universe where reality is closer to Arthurian myth. At the end of a series of conflicts, King Arthur's nemesis, Morgaine Le Fey is finally victorious; Arthur is killed. The Doctor puts Arthur's body and his sword Excalibur in a spaceship which he places at the bottom of Lake Vortigern in his home universe. Morgaine apparently seals the Doctor in the Ice Caves and becomes ruler of her solar system.

"Battlefield." These events are simply described as happening in the 8th century.

The flask contaning the essence of the evil entity Fenric is stolen by a group of Vikings, who then bring it with them to their villiage in Northumbria.

The runes describing these events are "a thousand years old" by the time of "The Curse of Fenric" (1943).

On the planet Traken, the Keeper who maintains peace on that world and its Union passes away. He is replaced by one of his Consuls, who becomes the new Keeper. This Keeper will meet the Doctor in the 1980s.

A thousand years before "The Keeper of Traken" (1981).

Around this time, the planet Urbanka finally becomes completely uninhabitable, sucked dry by Monarch's need for resources.

A thousand years before "Four to Doomsday" (1981).

January 6: King Edward is laid to rest and Harold II is crowned king.

Historical accounts and "The Time Meddler."

The Monk sets up a base in an abandoned monastery, and places an atomic cannon on a cliffside to later destroy a Viking fleet.

Prior to "The Time Meddler."

The Time Meddler: The Watcher; The Meddling Monk; A Battle of Wits; Checkmate: The 1st Doctor, Vicki and Steven stop the Meddling Monk's plan to destroy a Viking fleet and thus change history. The Doctor sabotages the Monk's TARDIS, stranding him in the 11th century.

September 25: King Harold II defeats the Viking invaders at Stamford Bridge in the north of England.

Historical accounts and "The Time Meddler."

October 14: King Harold II is defeated and killed by William the Conqueror at the Battle of Hastings.

Historical accounts and "The Time Meddler."

A monastery is built on the site of what will become Forgill castle in Scotland.

"Terror of the Zygons." Exact date is conjecture. Broton, disguised as the Duke of Forgill, says the monastery was built in the 11th century.

Around this time, the Convent of the Little Sisters of St. Gudula is founded.

"The Stones of Blood." Exact date is conjecture. The convent is said to have been founded in the 12th century.

The other end of the Borad's Timelash, originating in 1985 on the planet Karfel, is in this time zone, around the Loch Ness area of Scotland. The Borad is banished to this time by the 6th Doctor and may, at times, be mistaken for the Loch Ness Monster.

"Timelash."

After refusing to do business with the Emir el Akir, the Emir has Haroun ed Diin's wife and son killed, his house destroyed, and his eldest daughter added to his harem.

A year before "The Crusade."

The Crusade: The Lion; The Knight of Jaffa; The Wheel of Fortune; The Warlords: During the third Crusade, the 1st Doctor and Vicki get involved in court intrigue at Richard I's palace in Jaffa, while Ian rescues Barbara from the evil Emir el Akir.

This story appears to take place a year or so after Richard I took Jaffa.

A man from this period is pulled ahead through time to 1975 as a side-effect of Operation: Golden Age.

"Invasion of the Dinosaurs." Exact date is conjecture. The man says that King Richard is away at the Crusades.

A medieval knight from this era is pulled forward through time by the Master to attack a UNIT convoy.

"The Time Monster." Exact date is conjecture. (Actually, exact date is a complete shot in the dark.)

September: Most of Sir Ranulf fitz Williams' treasury is given willing to King John to help support his wars with the French.

Six months before "The King's Demons."

Ranulf fitz Williams' cousin, Sir Geoffrey de Lacey, is summoned to London in order to take the Crusader's Oath with King John in a week.

A week before "The King's Demons."

March 3-5: The King's Demons: 1,2: The Master attempts to change Earth's history by sabotaging the signing of the Magna Carta. He has the shape-changing robot, called Kamelion, under his power assume the role of King John and behave erratically. The 5th Doctor, Tegan and Turlough arrive and are able to expose the imposter, taking Kamelion with them when they leave.

March 15: The Magna Carta is sealed by King John at Runnymead, England.

Historical records and "The King's Demons."

October: King John of England has his possessions, including the crown jewels, moved from King's Lynn to Lincolnshire, across an estuary, but they are swept away by the tide and lost.

Historical records and "The King's Demons."

Marco Polo is born.

Historical records and "Marco Polo."

Marco Polo, his father, Niccolò, and his uncle, Maffeo, begin their trip to Cathay (ancient China).

Historical records and "Marco Polo."

Marco Polo, his uncle and his father arrive at the court of Kublai Khan.

Historical records and "Marco Polo."

While Linx, a Sontaran, is on a reconnaissance mission near Earth, he is attacked by a squadron of Rutan fighters, damaging his ship, and forcing him to land.

Shortly before "The Time Warrior."

The Time Warrior: 1,2,3,4: The Sontaran, Linx, crashes on the planet Earth. To make repairs to his ship, he abducts several scientists from 1975. While working on these repairs, Linx also jeopardizes Earth history by giving the brigand Irongron advanced weaponry. The 3rd Doctor and Sarah rescue the scientists, and Linx and his weapons are destroyed when Linx's ship explodes.

In "The Sontaran Experiment," we learn that these events happened in the 13th century.

From this time onwards, the Forgill family faithfully serves the country of Scotland.

The Forgills have served Scotland for "7 centuries" by "The Terror of the Zygons" (1976).

On his 25th birthday, Marco Polo is given an appointment in Kublai Khan's service.

Historical records and "Marco Polo."

Marco Polo and his father and uncle ask Kublai Khan for permission to return home; the Khan refuses.

Historical records and "Marco Polo."

Inside the Spaceship: The Brink of Disaster: The TARDIS, containing the 1st Doctor, Susan, Barbara and Ian, arrives on Earth, in China.

Marco Polo: The Roof of the World; The Singing Sands; Five Hundred Eyes; The Wall of Lies; Rider from Shang-Tu; Mighty Kublai Khan; Assassin at Peking: The 1st Doctor, Susan, Ian and Barbara encounter Marco Polo. With him, they travel to meet Kublai Khan and, after almost losing the TARDIS to the Khan, save him from an assassination attempt.

Rudolf de Nuremberg develops a method of wire-drawing which makes use of waterpowered machinery.

Historical records and "The Masque of Mandragora."

October 25: King Henry V defeats the French at the Battle of Agincourt.

Historical records and "The Masque of Mandragora."

The Aztec high priest Yetaxa dies.

According to Barbara's estimate in "The Aztecs."

The Aztecs: The Temple of Evil; The Warriors of Death; The Bride of Sacrifice; The Day of Darkness: The 1st Doctor, Susan, Barbara and Ian are separated from the TARDIS in Aztec Mexico. After Barbara, posing as the reincarnation of a dead high priest, Yetaxa, unsuccessfully tries to put an end to human sacrifice, the group manages to get back to the ship and escape.

Exact date is conjecture. Adding 20 years for a generation to pass after Yetaxa's death in 1430 arrives at this date.

Leonardo Da Vinci is born in the small Tuscan town of Vinci, near Florence, Italy.

Historical records and "City of Death."

In one day, 20 000 Aztecs are sacrificed to the god Huitzilopochtli.

Historical records and "The Aztecs."

The Meddling Monk discusses the possibility of powered flight with Leonardo Da Vinci.

"The Time Meddler." Exact date is conjecture. This is the year that Leonardo is first believed to have drawn plans for a flying machine.

In the Dukedom of San Martino, Italy, court astrologer Hieronymous predicts the Duke's imminent death.

Shortly before "The Masque of Mandragora."

The Masque of Mandragora: 1,2,3,4: The 4th Doctor and Sarah are brought to San Martino, Italy by energy from the Mandragora Helix. Acting through the Cult of Demnos, the Helix attempts to gain control of the Earth by destroying several prominent thinkers of this time, thus plunging the world into a new Dark Age. The Doctor manages to drain some of the Helix energy and "short-circuit" it, although it is due to return towards the end of the 20th century.

This date is given only in the novelization, and is used by most other chronologies.

Leonardo Da Vinci finishes his most famous painting, the Mona Lisa.

"City of Death." It was really finished in 1505 in our world, but Tancredi does not contradict the Doctor and, presumably, the Doctor was there, so I assume he knows better.

City of Death: 2,3: The 4th Doctor visits Florence, Italy in an attempt to track down a number of seemingly authentic copies of Leonardo Da Vinci's Mona Lisa. While there, he meets Captain Tancredi, one of the splinters of Scaroth, who is forcing Da Vinci to paint more than one Mona Lisa, so that a future splinter of Scaroth can make a fortune selling them all. The Doctor sabotages the scheme.

March: Hernando Cortéz arrives in Mexico.

Historical records and "The Aztecs."

May 2: Leonardo Da Vinci dies at the age of 67 at the Château de Cloux, near Amboise, France.

Historical records and "City of Death."

Hernando Cortéz assumes control of Mexico after the destruction of the Aztec state.

Historical records and "The Aztecs."

More than 370 religious houses are dissolved by order of Henry VIII, including the Convent of the Little Sisters of St. Gudula.

Historical records. The Convent's dissolution is from "The Stones of Blood."

January 15: The Doctor is present at Queen Elizabeth I's coronation.

Historical records. The Doctor's presence is established in "The Curse of Peladon."

Boscombe Hall is built on the site of the former Convent of the Little Sisters of St. Gudula.

"The Stones of Blood."

The Massacre of St Bartholomew's Eve: War of God; The Sea Beggar; Priest of Death; Bell of Doom: In Paris, the 1st Doctor and Steven become involved in the political/religious intrigue leading up to the massacre of all Huguenots in the city. They encounter the Abbot of Amboise, the Doctor's double, and Anne Chaplet, a young girl who may be Dodo Chaplet's ancestor.

The west wing of Chase Mansion is completed.

"The Seeds of Doom."

The Chase: The Executioners: Shakespeare meets with Queen Elizabeth I regarding his plays.

Queen Elizabeth refers to having seen a play with Falstaff. This is probably a reference to his first appearance in Henry IV, finished in this year.

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