Since 1978, the Assilah medina hosts an annual street art festival where Moroccan and international artists, along with children, paint graffiti murals throughout the streets of the old town. They leave these murals up year round until the next festival, when they paint the walls white and do it all over again.
The style of graffiti and the playfulness involved is unlike any other street art I have seen. This just adds to the interesting contrast that already exist in the old medina of Assilah.