New chronology is an alternative history theory

https://en.wikipedia.org/wiki/New_chronology_(Fomenko)

The new chronology is a pseudohistorical conspiracy theory proposed by Anatoly Fomenko who argues that events of antiquity generally attributed to the ancient civilizations of Rome, Greece and Egypt actually occurred during the Middle Ages, more than a thousand years later.

The conspiracy theory further proposes that world history prior to AD 1600 has been widely falsified to suit the interests of a number of different conspirators including the Vatican, the Holy Roman Empire, and the Russian House of Romanov, all working to obscure the "true" history of the world centered around a global empire called the "Russian Horde".