Posters Signs and Sticker street art: All of these types of urban art are paper-based types of street art that are common in European cities like Madrid and London. Posters are prints produced in large quantities and may represent various things and inform people about events or express ideas (political, social activism, etc). Stickers are also posted publicly and promote political, entertainment and social topics. Some labels are hand-drawn and others are printed ones. Collective memory may inspire designers to produce such posters and stickers in two main ways: (a) giving them a topic and, as a result, a message to express and (b) giving inspiration about the Yarn bombing background of a poster or the visual part of a sticker. In that way, a place where an It is a type of street art uses colorful important activism activity took place may displays of knitted yarn/fiber instead of be known to foreigners and their activity usual paints or prints. It is a new form of may be remarkable and an example to street art first appeared in 2000s. Designs follow. Furthermore, a place where many are based on trees (Figure 13) (or even in similar personal stories may acquire a urban equipment (Figure 14)) and thus, specific character, i.e. a Place des Bisous most of the artists, use natural or handmade (Kiss Square) in France. fibers to protect the environment. Colors, designs and the representation may derive Sculptures by collective memory as they can express feelings about a specific event or memory Such artworks are 3D structures that type. Such an artwork can produce new are associated with political, religious memories, as it was happened in the past in and historical events. However, during similar type of artworks, like the chewing the last years, there is an on-going trend gum-tree in Larisa, Greece or the chewing to introduce things about daily life gum-wall in Seattle, USA (Figure 15). (and activities (people sitting, watching the others, play each other, etc). Thus, collective memory can be easily expressed through sculptures. In that way, people can learn about the past of a place or even interact with the artworks. Famous are the sculpted shoes on the Danube Bank in Budapest referring to Jews who were massacred during the WW II. 73