
Though we know much about the layout of ancient Rome, there are many questions that remain unanswered. You can stroll through Rome today and see many ancient sites, but one must always remember that most of the ancient city is below one's feet. Centuries of sediment buildup mean that the terra firma that Romans walked on is sometimes meters below the current ground level. The existing fragments of the Forma Urbis Romae give us a clear picture of how the ancient city was laid out, and any new fragments would add greatly to our knowledge.
The Forum of Peace was finished in 75 CE by the emperor Vespasian to commemorate his victories in Judea. The forum/temple complex was built adjacent to the Republican Forum, Forum of Julius Caesar and Forum of Augustus. In later years this area was see even larger and more splendid forums built by succeeding emperors. The Forma Urbis Romae was installed much later, finished in 211 CE by the emperor Septimius Severus. The map measured 60x45 feet and comprised of 150 carved marble slabs. The city was depicted in its contemporary layout, circa early 3rd century CE. Like many ancient artifacts and buildings made or marble, the map fell victim to Medieval plundering and destruction. Fragments began to be excavated during the Renaissance and today we have an assortment of 1,186 fragments.