Leaders from countries around the world will participate in the event.
Prime Minister Boyko Borissov is on a working visit to Poland, where he will participate in the official ceremony marking the 75th anniversary of the of liberation of the former Auschwitz-Birkenau concentration camp, the cabinet's press service said.
The Bulgarian Prime Minister will attend the Commemoration of the Gate of Death in the former Auschwitz-Birkenau camp and honor the victims' memory.
Leaders from countries around the world as well as heads of international organizations will participate in the event.