The Statue of Roman Emperor Constantine was modified to look more Nordic from Mediterranean

This is the icon of Emperor Constantine the Great of Byzantium, the first Christian Emperor of Rome.
An icon is a religious depiction of the exact image of the subject. An icon not only captures the true physical attributes of the person, it captures also the spiritual essence of the person.
Here then is the Eastern Othordox Church’s interpretation of the physical apperance of Emperor Constantine the Great, the brother of Princess Anastasia, another saint of the church.
This icon of the Emperor Constantine, is modeled on the bust located at the Palazzo dei Conservatori in Rome….

Here is a gold coin of Constantine:

Here is a silver coin of Constantine:

Constantine was born in AD272 or 273 at Naissus in modern-day Serbia, son of the Emperor Constanius.
He was proclaimed Emperor in the Roman stronghold of Eboracum, now York in England in AD306 by his troops on the death of his father. They were both on a military campaign against Scottish tribe the Picts.
He founded Constantinople, as a new Rome and centre of empire, and died there in AD337.
And here is an orthodox church icon of Princess Saint Anastasia, Emperor Constantine the Great’s junior sister:

And here those who seek to suppress and distort Mediterranean History modified the face of Constantine to look more Nordic:


Second, the statue you posted appears to be a copy of an original piece. Here is the caption beneath the picture you posted, it reads:
“Head of Constantine’s colossal statue at the Capitoline Museums. The original statue of marble was acrolithic with the torso consisting of a cuirass in bronze…”

See: http://www.culture24.org.uk/history+%26+heritage/time/roman/art31934