The difference between the two images of the Syrian desert is not immediately obvious.

But a closer look reveals the photo is in fact proof of the destruction of a 2,000-year-old temple, blown to smithereens by a gang of violent extremist thugs hiding behind the pretext of religion.

The first of the satellite images was taken on June 26, the second was taken on August 27 - after the the Baal Shamin temple was destroyed by ISIS militants.

The small, rectangle structure can just be made out in the first, a grey mess of rubble can be seen in the second.

Scroll down for video

Confirmation: The Temple of Baal Shamin had stood in the desert for 2,000 years, but was destroyed by ISIS at some point in the last months, as these images - taken in June (top) and this week (bottom) prove

Erasing history: The terror group blew up the magnificent temple (pictured) on Sunday, after laying explosives

Hit list: The temple was the latest in a number of ancient treasures to be destroyed by the group

The grainy images show that the famed temple, considered the second-most significant in ancient Palmyra, 'has been blown to bits,' spokesman Einar Bjorgo said, adding: 'It has been flattened.'

The UN training and research agency UNITAR said it believed the main building had been razed to the ground, but the surrounding columns 'seem to be less affected'.

Local witnesses to the destruction - described as 'immense loss for the Syrian people and for humanity' by UNESCO - say ISIS had been laying explosives around the temple for a month.

But it is thought the extremists, who have become known for destroying the ancient wonders they find in the lands they conquer, may have only blown it up last Sunday.

It came just days after fighters beheaded the 82-year-old retired chief archaeologist of Palmyra, and posted pictures of his body on the internet.

Khaled Assad was held hostage by ISIS for over a month before he was beheaded: the vile militants hope to get the man who had devoted his life to his home town to reveal where its treasures were hidden.

He refused, and paid for it with his life.

Murdered: Khaled al-Asaad was killed by ISIS because he refused to tell them where its treasures were hidden

'Oasis of the Syrian desert': ISIS has already destroyed the Temple of Baal Shamin, the Lion of al-Lat and several statues in the city of Palmyra - and experts warn its many other treasures could be next

Yet all he loved is now in danger of being destroyed by ISIS, who seized the city in May from government forces.

Dr Robert Bewley, Project Director at the School of Archaeology at Oxford, predicted the ancient city will be razed to the ground 'monument-by-monument' by ISIS - to wring every last propaganda opportunity out of the destruction.

Dr Bewley claimed the terror group is determined to destroy Palmyra, known as 'the oasis in the desert' because of its ancient history famed for well-preserved Greco-Roman ruins, piece by piece.

Bloodbath: The terror group could also destroy Palmyra's Roman amphitheatre (pictured)

Public execution: In July, ISIS forced 25 young men to shoot captured soldiers in the ampitheatre

He said: 'One fear is that ISIS will do piecemeal damage over the coming weeks to keep the publicity machine running, so it will be a slow but equally destructive approach.'

Already, ISIS have destroyed the statue of the lion of Al-Lat, while they've used the ancient Roman ampitheatre as an arena for their vile mass executions.