There is a wall on Valencia on what I believe was once a police station, many years ago... (At least, in my childhood thousands of years ago, I dreamt at least twice of something terrible happening, and needing to find this building to get help... and being unable to find it and/or get in?) I don't know what it is now, if anything, but I DO know it gets a wheatpaste-facial every few days/weeks/months by local artists, especially political artists. And now, murals!
I often Google references I find here: today I learned about an autonomous region in Syria called Rojava based on posters seen here.