70

Unknown dates

 * According to the Sixth Doctor, this was the year that the Romans began the construction of the Colosseum. (PROSE: State of Change)
 * In the early 21st century, archaeologists found a Roman mosaic which they dated to this year. On the mosaic were scenes, grapes and a Dalek. This suggested there were Daleks on Earth in the 1st century AD. (PROSE: I am a Dalek)