it took 3 weeks because they had help from the sky runners (aliens )
78 years
=It took about 1000 people adding the slaves they used.=
Building work has been ongoing throughout the city's history (as in every city...)
how long does it take to build a asimo
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.
how long did it take to build the half moon
how long did it take to build the scottish parliment?
how long did it take to build cabot tower
You mean the modern, Mexico City? Over 493 years, since 1521 until this day. If you mean how many years it took to rebuild Mexico City from the destruction inflicted by the Spanish conquistadors after defeating the Aztecs in 1521, it never actually "recovered"; the Spanish built several administrative buildings atop the ruins of Tenochtitlan over the following 30 or so years, slowly repopulating the city.
hs2 will take 15 years to build
how long does it take to build a beam bridge of 2400 sq ft
it took 3 years