Nobody knows for sure but it is estimated that it was built over several centuries.
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.
It was built about 5000 yrars ago so nobody knows.
14
14 years
10 years
The Templo Mayor in Tenochtitlan, which is present-day Mexico City, took approximately 200 years to build. It was continuously expanded and reconstructed by various Aztec emperors until the Spanish conquest in 1521.
10 years
to many years to count
three years
12
10 Years
it took 5 years