Most recently I remember it happening really really badly within Syria. Very intentional destruction. But yes, it happens all the time--Iraq included. With the technology we have now, we can preserve a lot of it (digitally at least).

I hate how it's so damn hard to find these things and yet so easy to destroy it.

A lot was destroyed but a lot of it was looted and and sold to sleazy collectors. Remember when the guy who owns Hobby Lobby got caught buying looted artifacts?

Still horrible, obviously, but at least there’s some hope looted items will be recovered.

Yea ISIS and other extremist groups like to destroy evidence of their ancestor’s greatness for some reason.

Lesser sons of lesser sons