Who started the construction of Colosseum in Rome?

A. Nero
B. Vespasian
C. Titus
D. Domitian

The Colosseum is situated just east of the Roman Forum. Construction began under the emperor Vespasian in AD 72 and was completed in AD 80 under his successor and heir,Titus. Further modifications were made during the reign of Domitian (81–96).