Among the lowlights of his reign was the exile and subsequent execution of Helvidius Priscus.  His rise to emperor was due mainly to the military success of Antonius Primus and the support of Mucianus.  His reign saw the re-building of the Capitol, which had been burned during a conflict between his supporters and those of his predecessor Vitellius, whom he rebelled agains
Among the lowlights of his reign was the exile and subsequent execution of Helvidius Priscus.  His rise to emperor was due mainly to the military success of Antonius Primus and the support of Mucianus.  His reign saw the re-building of the Capitol, which had been burned during a conflict between his supporters and those of his predecessor Vitellius, whom he rebelled against while commander in Judea.  Succeeded by his son Titus, FTP, name this Roman emperor who began construction of the Colosseum and who founded the Flavian dynasty in 69 AD.
Among the lowlights of his reign was the exile and subsequent execution of Helvidius Priscus.  
Caesar Vespasianus Augustus or Titus Flavius Vespasianus