This larger-than-life marble statue is on display at the National Archaeological Museum in Athens.
For more information, see this link:
https://en.wikipedia.org/wiki/Poseidon_of_Melos
I put this rough model together from 17 photos available via Google Image Search. I couldn't find enough photos from the far sides and rear to finish the Poseidon unfortunately. As a proof of concept, this shows that photos culled from the Internet can be used to model an item.