Tacitus · Ptolemy Were Tacitus and Ptolemy alive at the same time? Yes. Tacitus and Ptolemy were alive at the same time, from c. AD 100 to c. AD 120. TacitusRoman historian and senatorBorn c. AD 55 · died c. AD 120Ptolemy2nd-century Roman mathematician, astronomer, geographerBorn c. AD 100 · died c. AD 170 Saint PeterPaul the ApostleNeroPlutarchEpictetusTacitusPtolemyMarcus AureliusNagarjuna Tacitus and Ptolemy in bold, with some of their best-known contemporaries. Drag across to see the age each reached in any year. Faded ends mark uncertain dates.