The Israeli West Bank barrier is a physical barrier being constructed by Israel consisting of a network of fences with vehicle-barrier trenches surrounded by an on average 60 meters wide exclusion area (95%) and up to 8 meters high concrete walls (5%). It is located partly within the West Bank, partly along the border between the West Bank and Israel proper.
The barrier is a very controversial project. Supporters argue the barrier (i) is a necessary tool protecting Israeli civilians from Palestinian terrorism including suicide bombing attacks in buses and bus stations, shopping centers, stores, restaurants and other public places, that increased significantly during the al-Aqsa Intifada ; and (ii) has helped reduce incidents of terrorism by 90% from 2002 to 2005. (VIA wikipedia.org)
Graffiti on the Palestinian side of walled sections of the barrier has consistently been one of many forms of protest against its existence. Large areas of the walls feature messages relating to the conflict, demanding an end to the barrier, or criticizing its builders and its existence (‘Welcome to the Ghetto-Abu Dis’). In August 2005, a graffiti artist named Banksy painted nine images on the Palestinian side of the barrier.  He describes the barrier as “the ultimate activity holiday destination for graffiti writers”. (VIA wikipedia.org)