1. Located on the south side of the city center, adjacent to the Addis Ababa Museum, it is recommended to visit together; 2. The "red terror" is clearly defined in Wikipedia, specifically describing the bloody massacre of political dissidents by former head of state of Ethiopia, Mengstu, in 1977; 3. The main objective description of the cause of this history in the memorial hall has been the result, but there is no scolding Mengstu, just said that I hope that such a tragedy will not be repeated in the future; 4. Free visit, but the staff will persuade you to donate a little money.