Original: Titus Flavius Vespasianus ( 30 December 39 â '' 13 September 81 ) , commonly known as Titus , was Roman Emperor from 79 to 81 .
Simplified: Titus ( Titus Flavius Vespasianus , 30 December 39 â '' 13 September 81 ) was Roman Emperor from 79 to 81 .