In the new version of Mediateka CLZ users will obtain access to firs big part of digitized photos and documents from private collections of Bialystok’s citizens. Many of them have never been published before. Within e-Mediateka project we gained an opportunity of comprehensive elaboration much of the owned by CLZ collection and share it with recipients. The iconography from e-Mediateka will be gradually developed, enriching and popularizing the knowledge about the past of Bialystok, its historical cultural and ethnic diversity. Free access to these collections will help in initiating grassroots artistic, scientific and popularizing activities which will use gathered in Mediateka CLZ content.