The Islamic State thugs who blew up a 2,000-year-old Syrian temple were so proud of their depravity that they posted images of the explosion online.

The terrorists destroyed the Baal Shamin temple at the historic ruins of Palmyra — an act that UNESCO, the United Nations’ cultural organization, decried as a “war crime.”

The Roman-era temple, whose name means “Lord of Heaven,” was dedicated to the pagan god of Baal and dates to the 1st century AD.

The images of its destruction, posted on social media Tuesday by supporters of the terror group, showed militants carrying barrels of explosives and laying them inside the ancient temple. Smaller wired cans lay around the temple walls and columns.

One image showed a gray plume of smoke rising above the temple from a distance, and then an image of the temple reduced to a pile of rocks.

One caption read: “The complete destruction of the pagan Baal Shamin temple.”

Emma Loosley, a professor at Exeter University who lived near Palmyra for three years, told the BBC that the temple’s cella, or inner chamber, was “pretty much perfect.”

“I can’t think of another temple as beautifully preserved as the temple of Baal Shamin, and what was special about Palmyra was that it was a unique culture,” Loosley said.

“It had its own gods, its own form of art and architecture that you don’t get anywhere else.”

Although the images of the explosion were new, the temple was actually obliterated a month ago, according to the Syrian Observatory for Human Rights.

Other officials said it was destroyed Sunday.

Last week, Islamic State extremists released photos of the beheading of Khaled al-Asaad, an 82-year-old Syrian archaeologist who had looked after Palmyra’s UNESCO World Heritage ruins for about 40 years.