The first historical mention of Palmyra dates back to the 2nd millennium B.C.
Tourists are seen here walking in Palmyra, September 30, 2010.
When Palmyra was first captured by the Islamic State, Syrian news agency SANA released a number of images showing the condition of the city's ancient ruins at the time.
Palmyra's 2000-year-old Lion of Al-Lat, photographed here before the Islamic State takeover, was destroyed by ISIS militants after the group took over the city.
next slide will load in 15 secondsSkip AdSkip AdAs was this triple arch, photographed in 2010.
Once ISIS was in control of Palmyra, the group distributed images of the cities' antiquities being destroyed
An ISIS-distributed image shows the destruction of a Roman-era temple in Palmyra.
Militants also destroyed Palmyra's Tadmur prison where enemies of the Syrian government were held and, reportedly, tortured.
This image shows Palmyra's Temple of Baal as it appeared in 2009...
next slide will load in 15 secondsSkip AdSkip Ad...and this image, released in August, 2015, by the Islamic State, purports to show the destroyed remains of the same temple.
Fighting between Syrian and ISIS forces led to further damage of sites at Palmyra.
The fighting also damaged modern facilities, like this gas station.
A member of forces loyal to Syria's President Bashar al-Assad takes a position inside a palace complex during their offensive to recapture Palmyra.
Now that it has been recaptured, more images have emerged showing the damage to Palmyra's artifacts.
next slide will load in 15 secondsSkip AdSkip AdAnother damaged artifact in Palmyra's museum.
Empty display stands are pictured inside the museum of the historic city of Palmyra, after forces loyal to Assad recaptured the city.
It is unclear if the artifacts once displayed here were looted by ISIS militants or removed preemptively by Syrian anqituities authorities before the ISIS takeover of the city.
A flag belonging to the Islamic State fighters is seen on a motorbike, after the city was retaken by Syrian and Russian forces.