The copying of ancient artifacts predates 3D scanning and printing. The V&A Museum has a huge hall called the Cast Court, which displays 3D reconstructions of statues and architecture made using plaster casts.

https://en.wikipedia.org/wiki/Cast_Courts_(Victoria_and_Albe...

https://www.vam.ac.uk/collections/cast-collection

The most famous copy is probably Michelangelo's David:

https://www.vam.ac.uk/articles/the-story-of-michelangelos-da...

But the largest example is from Trajan's Column in Rome, which is so tall it is reproduced in two sections:

https://www.vam.ac.uk/articles/trajans-column