The Blue Shield is an international symbol of cultural protection used to indicate that a site or building has significant cultural or historical value and is protected under the 1954 Hague Convention for the Protection of Cultural Property in the Event of Armed Conflict.
International Humanitarian Law: Its Origins, Development, and Rules for the Protection of Civilians, Civilian Objects, and Private Property in Armed Conflicts
The hiding of armed elements among civilians or the use of residential buildings to store weapons or military equipment may constitute a serious violation of international humanitarian law, turning civilian buildings and neighborhoods into potential military targets, and exposing the civilian population to direct danger.