A social experiment “A cup of coffee in the darkness” will be held on 17 September 2019 in the art-gallery of visually impaired artists in the Archeological subway, Plovdiv. The NRBC invites all Plovdiv citizens and guests to submerge into the world of visually impaired people and have a cup of coffee in total darkness, thus experiencing the challenges and difficulties, which the visually impaired encounter in their everyday life and understand more about living without eyesight. It’s a free entry and the initiative is held within the “"Expanding the Center for Mutual Assistance, Integration and Support” of the National Rehabilitation Center for the Blind - Plovdiv" Project, funded by the Operational Programme for Human Resources Development, “Equal Chances” procedure.