Main theme in this paper are mural graffiti as specific group of graffiti which emerges in last decade of 20th century and which remain to this day. Author deals with their theoretical research and generalization, in order to pay attention towards domestic mural - graffitism in further elaboration. A specific movement in domestic mural - graffitism originates in the northern part of the city of Kosovska Mitrovica which is designated by author as national-cohesive. It is based on mural-graffiti which is known by sentence written in the upper part of picture: 'jer, odavde nema nazad!' ('..because there is no way back!'). This mural-graffiti express all of the dilemmas of the Serbs in the northern part of Kosovo and Metohia, and it originated as the result of desperate aspirations to save the Serbian part of the city of Kosovska Mitrovica, but as well the wider territory, from Albanian (Shqiptar) territorial pretensions and secessionism from the Serbian state. Greater (southern) part of the city of Kosovska Mitrovica hold Albanian population. With its text and message this graffiti could be only compared with only one masterpiece in Europe - 'Gernika' that was painted by Spanish artist Picasso. Hence, author theoretically and competently explicate, believing that mural - graffiti in Kosovska Mitrovica, according to many factors, has that particularly value which has 'Gernika' for the Europe and the World. While 'Gernika' express global protest in order not to repeat the suffering of innocent civils in a war, thus 'Serbian Gernika' reflexes in itself 'roar and cry', strength and dedication of one part of the Serbian people to remain on theirs homeland, no matter how can that be hazardous for them. In days that will come and in days that preceded to the, so called 'Bruxelles Agreement' (in according to, Serbian population must fall under the jurisdiction of the self-proclaimed 'establishment of Republic of Kosovo'), this kind of message and picture on the wall could be determined and fatal for the Serbian people. Question is, whether the Serbs in Kosovska Mitrovica obey their 'oath' on the wall? From their answer in great degree depends and their destiny to come.