| The empire reached its greatest extent under Trajan, the second in this line. |
| In an early chapter of the Agricola, Tacitus asserts that he wishes to speak about the years of Domitian, Nerva, and Trajan. |
| Vespasian sent Trajan, with two thousand foot and a thousand horse, against it. |
| It is true that war reporting has speeded up since AD 106, the year that Trajan commissioned the column offering a picture chronicle of his Romanian campaign. |
| The baths of Trajan, of Caracalla, and Diocletian all contained rooms determined to be libraries. |
| The Draco or dragon had been borrowed from the Parthians after the death of Trajan. |
