An AP report which Explorator found here tells how two sculptors took over two years to carve a 2.2-ton ionic capital for the Propylaea on the Acropolis at Athens. Apparently the Propylaea is being extensively restored, and will be seen in renewed glory next year.
There's a photo, too. It will take me a while to get used to the ultra-clean lines of the undoubtedly authentic new capital. It look almost Disney-like. But that's the sort of building that the Athenians saw in 432 BC.