49th century

The 49th century was home to the Time Agency. (PROSE: Eater of Wasps, Trading Futures, The Man Who Dreamed of Stars) It was an era of peace and prosperity on Earth. (PROSE: Trading Futures)

During the War in Heaven, the enemy launched an "all-out assault" on the 49th century, which Robert Scarratt helped to counter. (PROSE: The Brakespeare Voyage) A boy from Faction Paradox suggested that the Doctor was originally a human from this century who began travelling in time and space to flee from an Enemy who had overrun his home, but that the Doctor's biodata was then overwritten with a multitude of different origins which supplanted this version of his history. (PROSE: Unnatural History) After the Eighth Doctor was stripped of his memories of the Time Lords and Gallifrey, he theorised that he may have been an exile from the 49th century. (PROSE: Escape Velocity)

Refugees who came from a dying world in this century projected their consciousnesses through time and made contact with a spiritualist named Mrs Vanguard in the 1890s, passing themselves off as ghosts. They planned to transfer their consciousnesses into the bodies of influential people in 1890s London with their ultimate goal to take control of Queen Victoria, who they knew from historical records to still be mourning her long-dead husband Prince Albert. The refugee possessing the body of Henry Gordon Jago mentioned that, in decades to come, there would be "brutal, terrible wars that will decide the fate of this world." With one of their kind possessing Queen Victoria's body, they intended to "turn the tides of history" and create a new future, thereby preventing the destruction of their world. Their plan was defeated by Jago, Professor George Litefoot, Ellie Higson, and Toby. (AUDIO: The Spirit Trap)

For two days in this century, the Great Crystal Choir Crown of Pseudolonica VII was left unguarded. The Fourth Doctor used this opportunity to steal it so he could give it as a Christmas gift to Romana II. (PROSE: Present Tense)

Human activity
The Tenth Doctor thought of the 49th century as a period of human history when "everyone was off exploring the unknown". (AUDIO: Death's Deal) The Free Colony Movement was active, (PROSE: The Man Who Dreamed of Stars) and El Diablo was colonised by humans near the end of the century. (PROSE: Big Bang Generation) Humans also terraformed Alfava Metraxis and began to settle the planet. Over the next two centuries its population grew to six billion. (TV: The Time of Angels)

Earth's moon was terraformed to have an atmosphere. (PROSE: Trading Futures) One area of the Moon wasn't explored by humans until this century; the Tenth Doctor and Rose Tyler once considered leaving a Women's Institute flag there to confuse 49th century historians. (PROSE: I Am a Dalek)

The Hokrala Corp was active. (PROSE: The Undertaker's Gift)

According to one account, World War V happened at some point during this century. (AUDIO: Singularity)

Other universes
In a parallel universe, Martin Bannister was uncertain whether or not to make it explicit that Doctor Who and Susan Who came from Venus in the 49th century. (AUDIO: Deadline)

Behind the scenes
In the original Doctor Who pilot episode, Susan Foreman said she was born in the 49th century. This line was not carried over into An Unearthly Child, as it was decided that the Doctor and Susan's home would not be attributed to a specified time. This was referenced in Unnatural History and Escape Velocity, as well as Deadline.