Nothing really, it was there long before the Romans ever came to Britain.
No the Romans did not build it
No they did not
Stonehenge is pre Roman, begun about 5000 year ago
The Babylonians didn't build Stonehenge.
Stonehenge is thought to have been built by the beaker people.
Oh dear ! Methinx someone is having a little dig at our US cousins ! Native Americans & Stonehenge have no connection.
limestone
The blue stones at Stonehenge came from the Prescelly mountains in south Wales.
By the use of sophisticated geometric design and prefabrication techniques.
No. It is not clear whether Merlin actually existed.
England
To build the whole of Stonehenge will obviously depend on how many people there was for the task. What we suggested was that, given a great concentration of effort, is the sarsen structures, the biggest bits of Stonehenge, could have been built within a period of three years. We suspect that probably it took longer. There is the opinion that Stonehenge was constructed in sections over a period of time that span as many as 300 to 500 years.
Stonehenge was never discovered because it was never lost. Stonehenge is a massive monument made from huge stone and it stands on a treeless plain, where is is easily viewable. People have always known where it was, including the Romans when they invaded Britain, they just aren't certain what it was, how it was built or why.