Although the world's largest jigsaw puzzle still remains a mystery, researchers have discovered another piece that brings them closer to completing the 2,200 year old map of ancient Rome.

Forma Urbis Romae, which is made of thousands of marble fragments, was first unearthed in 1562.

Now, a new piece that completes the words 'Circus Flaminius' has been uncovered.

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Forma Urbis Romae, which is made of thousands of marble fragments, was first unearthed in 1562 and a new piece with the words 'Circus Flaminius' was discovered. The ancient map is 60-foot by 43-foot and illustrates details of Rome between 203 AD and 211 AD

The ancient map is 60-foot by 43-foot and illustrates details of Rome between 203 AD and 211 AD.

The new addition was discovered in 2014 at the Palazzo Maffei Marescotti, a building owned by the Vatican, reports Discovery News.

Forma Urbis Romae shows the ancient city during the reign of the emperor Septimius Severus from buildings to streets to staircase.

Only about 10 percent, or 1,186 pieces, of the original map that hung on the Templum Pacis's (Temple of Peace) wall are legible and a most of the pieces are housed in the Capitoline museum.

The wall is located near the Santi Cosma e Damiano church, which was built sometime during the 16th century.

The gigantic map was carved on 150 marble slabs, but was ripped off the wall to most likely make lime for cement, according to some experts.

Who suggest the marble pieces were left after being recycled during the palace's construction.

Forma Urbis Romae was hung to the left of the new entrance of the church, which also has the original marble floor of the Templum Pacis.

WHAT IS FORMA URBIS ROMAE? The wall where the map was originally mounted in a building near the 6th-century Church of Santi Cosma e Damiano. Rows of holes where the map was attached using bronze clamps can still be seen. The Forma Urbis Romae or Severan Marble Plan of Roam was carved between 203-211 AD and covered the entire inside wall of the Templum in Rome. It showed every architectural detail in ancient Rome from the small shops, to large buildings and even each staircase. Only fragments remain today and most are held in the Capitoline museum. They cover just 10 percent the original map surface that once stood on a wall in the Templum Pacis (Temple of Peace). The wall still survives today in a building near the 6th-century Church of Santi Cosma e Damiano. Rows of holes where the map was attached using bronze clamps can still be seen. Carved on 150 marble slabs, the 60-foot by 43-foot map detailed every building, street and staircase in Rome until it was partially ripped from the wall, probably to make lime for cement. What was left fell down and broke apart in hundreds of unrecognizable pieces. Advertisement

Since the first discovery in 1562, more than 1,200 pieces have been unearthed.

'Of these about 200 marble chips have been identified and ideally located on the modern topography,' the Superintendency said in a statement.

The new fragment was discovered in 2014 during work at the Palazzo Maffei Marescotti, a building owned by the Vatican.

It is believed the marble piece ended up there as it was recycled during the construction of the palace at the end of the 16th century.

This new finding has pieced together at least three portions of the large puzzle and allowing researchers to transcribe text etched in the marble.

The new fragment lay in a private property next to a local road in the village Capraia e Limite. Ancient Roman Mosaic Found in Tuscany

The new addition was discovered in 2014 at the Palazzo Maffei Marescotti, a building owned by the Vatican, reports Discovery News . Forma Urbis Romae describes the ancient city during the reign of the emperor Septimius Severus from buildings to streets to staircase

A fragment of the world's oldest and largest unsolved jigsaw puzzle, a 2,200-year-old map of Rome made of thousands of marble fragments.

'The fragment relates to plate 31 of the map, which is the present-day area of the Ghetto, one of the monumental areas of the ancient city, dominated by the Circus Flaminius, built in 220 BC to host the Plebeian games, and where a number of important public monuments stood,' the Superintendency said.

Last month, experts created an incredible 3D reconstruction offers a rare glimpse at the grandest city of the world in all its glory. at the height of Rome's greatness.

Only about 10 percent of the original map that hung on the Templum Pacis's (Temple of Peace) wall are legible and a most of the pieces are housed in the Capitoline museum. The wall is located near the Santi Cosma d Damiano church, which was built sometime during the 16th century

The gigantic map was carved on 150 marble slabs, but was ripped off the wall to most likely make lime for cement, according to some experts. Who suggest the marble pieces were left after being recycled during the palace's construction

The virtual reality video takes the viewer through the city in first person, visiting all the famous sites including the Pantheon and the Colosseum, as they would have looked in 320 AD.

But what is totally unique about the simulation is that academics have filled in all the gaps, using historic records to recreate the streets and forums that would have existed in the period.

Forma Urbis Romae was hung to the left of the new entrance of the church, which also has the original marble floor of the Templum Pacis. 'Of these about 200 marble chips have been identified and ideally located on the modern topography,' the Superintendency said in a statement

Although the largest jigsaw puzzle in the world still remains a mystery, researchers have discovered another piece that brings them one step closer to complete a 2,200 year old map of ancient Rome. This new finding has pieced together at least three portions of the large puzzle and allowing researchers to transcribe text etched in the marble

The tour takes the viewer to Palatine Hill, showing the vast palaces that the emperors of Rome enjoyed, looking down on all of the grand city.

The narrator explains how the term palace actually originated from Palatine Hill, which eventually came to mean anywhere an emperor lives, but deriving from the physical place in Rome.

While today, only a number of columns and ruins can be seen at the ancient site, the reconstruction flies low over the city, showing the hill and all the building around it below.

'The fragment relates to plate 31 of the map, which is the present-day area of the Ghetto, one of the monumental areas of the ancient city, dominated by the Circus Flaminius, built in 220 BC to host the Plebeian games, and where a number of important public monuments stood,' the Superintendency said

Below it is the Circus Maximus, where the Romans would hold chariot races, animal hunts and religious festivals in the long, rectangular arena, recreated in detail.

The model, in recreating the hole city rather than individual sites, shows how close it was to the palace so that the emperor could simply walk down the hill to watch the spectacles.