Nerva (; born Marcus Cocceius Nerva; 8 November 30 - 27 January 98) was a Roman emperor from AD 96 to 98. Nerva became emperor when aged almost 66, after a lifetime of imperial service under Nero and the succeeding rulers of the Flavian dynasty.

Under Nero, he was a member of the imperial entourage and played a vital part in exposing the Pisonian conspiracy of 65. Later,