Authors: George Varbanov, Radostin Mihaylov, Denitsa Simeonova, Yordanka Eneva This is poster showing the historical development of brachytherapy in the world. It was presented on April 12, 2018 on Black sea Symposium for Young Scientists in Biomedicine (BSYSB) hosted by Medical University - Varna, Bulgaria. More info: https://www.researchgate.net/publication/324149993_Historical_Review_of_Brachytherapy