Perhaps you are referring to his indicating where the name came from "Christus." see related link below:
The Roman historian Tacitus called Christianity a living torch. He also used the words Christ and Christians in his writings.
Tacitus was not an emperor. He was a historian.
Tacitus wrote "Germania" .
'Annals' was written by Tacitus .
AnswerThe second-century Roman historian, Tacitus, was not a Christian. His strongly held republican views led him to take a harsh and generally biased view of the Roman emperors who had preced him. He was often a critic of Nero, although he does say of Nero that "his pledges were not dishonoured, and many [unpopular] decisions were made by the Senate itself". It was Tacitus who claimed that Nero punished the Christians of Rome unfairly for the Great Fire of Rome.
The Roman historian Tacitus called Christianity a living torch. He also used the words Christ and Christians in his writings.
Marcus Claudius Tacitus died in 276.
Tacitus was not an emperor. He was a historian.
Marcus Claudius Tacitus was born in 200.
Nicholas Tacitus Zegers was born in 1495.
Nicholas Tacitus Zegers died in 1559.
Tacitus wrote "Germania" .
Tacitus
Pope.
Tacitus is known as being a historian and Roman senator during the Roman Empire, there are several partial surviving works and writings of Tacitus left such as the Annals and the Histories.
I believe they call it "Earth". I believe they call it ''History''.
Agricola (who was also Tacitus's father-in-law)