Lysippos was the only artist authorized to make Alexander’s image, it was believed that none of his works has survived, but finally one of them was found: http://www.nationalmuseumofiran.ir/fa/explor/2/his/honar/party/3/images/2477.jpg - http://www.nationalmuseumofiran.ir/fa/explor/2/his/honar/party/3/images/2477.jpg (It is already in the National Museum of Iran)

This bronze statue was found in the city of Malamir, southeast of Susa in the Khuzistan province of Iran, however its neck is a little twisted but it is one of the most beautiful statues which has been found in Iran.

More info about Lysippos: http://en.wikipedia.org/wiki/Lysippus - http://en.wikipedia.org/wiki/Lysippus

During his life Lysippos was the personal sculptor of Alexander the Great. A recently discovered epigram of Posidippus, in the anthology represented in the Milan Papyrus, was inspired by a bronze portrait of Alexander:

Lysippus, Sikyonian sculptor, daring hand, learned artisan,
your bronze statue has the look of fire in its eyes,
that one you made in the form of Alexander. The Persians deserve
no blame. We forgive cattle for fleeing a lion.

Amazing that this bronze statue managed to survive - surely the chances are that it would have been placed in a prominent location of a victory, city or somesuch and later melted down for it's metal. The survivial of bronze statues is rare enough in itself, but this - from the personal sculptor of Alexander III "the great" himself is really quite amazing. The quality of that sculpture of beautiful - the quality of the moulding and artistry of the features on Alexander's face is exquisite. I do wonder, however, why the term "slightly twisted" applies to this  perhaps a little more than "slightly"! It's also odd that such an image would have been erected in Persia when Alexander's headquarters were ironically in the "old world" of his empire - Mesopotamia and Babylon (this was where he re-assembled his forces before he died and where many of his supplies were stationed). I can see even from what little remains of this sculture that his pupil - Chares on Lindos - would have been capible of constructing one of the "seven wonders of the ancient world" for the Lycian prince Mausleous.

Well, at least we know that this was actually an original and has avoided the nasty debate that regards Praxitilies' Hermes from Olympia, which many regard to be a Roman copy of the original, and that the original was taken to a Roman capital, in the manner of the Plataean Serpantine of Constantine (the hydra statue made from the melted down Persian weapons after the victory of Plataea over Xerxes' Persian forces in 479 BC, which was taken back in triumph to constantinople and used in the Hippodrome by the emperor constantine - it's still there in way...). There's another great reason to know that it's an original...it...was...found...in...Persia which perhaps confirms that it wasn't a Roman copy

...oh sorry I've changed the subject, but this topic has allowed me to have a nice rant about classsical art  - sorry Cyrus

It can be said that Alexander conquered the Persian empire when he captured Susa, its major capital.

Not Persia but Susiana, in fact in the west of the Persian gates, I think Persian cities could be considered as modern cities in those times but Susa was cerainly one of the oldest cities of the world, even older than Babylon.