The Pantheon is one of the most important and best preserved buildings of ancient Rome. Its history and its image is linked inextricably to the city and over the centuries has been a source of deep inspiration for artists of all time who admired the majesty, the harmony and the wonder of its architectural features. In 27 BC Agrippa, son of Emperor Augustus, built this temple dedicated to all gods, hence the Pantheon name that literally means "all the gods." It was rebuilt by Hadrian between 118 and 125 A.D. following a fire and converted into a Christian basilica in the early seventh century under the name of Santa Maria ad Martyrs, which allowed him to survive almost intact. Almost two millennia after its construction, the dome of the Pantheon is still one of the largest domes in the world and specifically the largest built in Roman concrete.