After the death of Nero, the last Julio-Claudian emperor, we had the year of the four emperors. Three, short-lived emperors came before Vespasian, who started the short-lived Flavian Dynasty. He and his two sons reigned, his sons’ names being Titus and Domitian.
Vespasian was the first ruler. He had served under emperor Nero, and was in Judea when Nero died. He was performing the siege of Jerusalem when he was called back to Rome to be emperor and defeat the rival. Vespasian started work on the Coliseum (or Flavian Amphitheater), which was then finished by his son, Titus. Vespasian helped the people recover from the fire of Rome that had occurred during the end of Nero’s reign as well.
Titus pretty much finished everything his father had started. He completed the siege of Jerusalem and the Coliseum. He was a good ruler, and unfortunately had a very short reign. He started his rule at age 40, and died at 42 to a fever. He completed the rebuilding after the fire as well.
Domitian was Titus’ younger brother, and was not really expected to be emperor, so he didn’t have much of an administrative background or training. He was viewed as tyrant by the senate, and that got him assassinated. There was another small fire in Rome at this time, and Domitian helped to rebuild that area of Rome.