Common heritage presents various materials in which the language either originates, is related to, or may be referenced to. The materials are individual artworks by artists of different localities. Term related documents, which may be a part of public or personal archives. They may refer to exhibitions, which gave impetous to specific ideas. Oral histories was initially a part of archive-in-becoming, which enabled mapping of the past from the point of view of artists and individuals working at a certain time and in a certain context. At the beginning, the project initiated by curator Andreja Hribernik included interviews with conceptual artists such as Marko Pogačnik, Vlado Martek, Zofija Kulik, and Bálint Szombathy, who either individually or in collaboration with other like-minded artists, left their distinctive marks on the artistic practices in Central and Eastern Europe in the late 1960s and in the 1970s. More about: Oral Histories. A specific quality of oral histories is also the introduction of polyphonic vocabulary used by each individual narrator. It results in redefining terms used in culture, art, and politics, according to specific spatial and time context, defying the notion of universally applicable ideas. Narrators of the glossary of common knowledge provided pieces for this puzzle in the documentation of seminar recordings.