On the evening of 2 December 1967, Denise Darvall and her mother were struck by a car while crossing a Cape Town street. Both were rushed to Groote Schuur Hospital. Denise's mother died on arrival. Denise, just twenty-five years old, suffered fatal brain injuries. In Ward D1, Louis Washkansky - a fifty-four-year-old grocer battling diabetes and terminal heart disease - had been waiting for a donor. Barnard's team had practiced the procedure on over fifty dogs, refining the technique of heart transplantation until they were confident it could work in a human patient. The surgery began late that night and lasted nine hours. When it ended, Washkansky had a new heart. He survived eighteen days before pneumonia overwhelmed his suppressed immune system, but the proof of concept was established: a human heart could be moved from one body to another and continue to beat.

The museum's two-hour guided tour follows the chronology of that night. It begins with the car accident - a recreation of the moment that provided the donor heart - and moves through the animal laboratory where Barnard perfected his technique. Visitors walk through a model of Denise Darvall's bedroom and Christiaan Barnard's office before entering the actual operating theatres. Two theatres were used simultaneously that night: one for the donor, one for the recipient. The surgery is recreated in the spaces where it occurred, with period equipment and detailed narration explaining each step. The tour ends in a recreation of Louis Washkansky's recovery room. At the conclusion, visitors are offered the opportunity to register as organ donors - a quiet gesture that connects the historical achievement to its ongoing legacy.

The museum does not treat the transplant as a simple triumph. It engages directly with the ethical and moral questions that the surgery raised in 1967. When is a person dead? If the heart is still beating, can a doctor remove it? Who decides? The concept of brain death, now standard medical practice, was not yet widely accepted when Barnard's team operated on Darvall. Religious leaders and ethicists debated the implications worldwide. The museum presents these debates honestly, acknowledging that the surgical breakthrough forced medicine, law, and theology to confront questions they had not been ready to answer. Barnard's brother Marius, also a surgeon on the team, later said that the ethical questions were more difficult than the surgical ones.

Christiaan Barnard became an international celebrity overnight, the most famous surgeon in the world. Norman Shumway at Stanford had developed much of the technique Barnard used, and the question of credit has been debated ever since. The museum honors everyone who played a major role - the surgical team, the nurses, the donor and her family, the recipient who volunteered for a procedure with no precedent. It also places the achievement in its South African context: a groundbreaking medical triumph in a country that denied basic rights and healthcare access to most of its citizens. The University of Cape Town trained Barnard. Groote Schuur Hospital provided the facilities. The achievement put South Africa on the global stage for something other than apartheid. Today the museum receives visitors from around the world who come to stand in the room where the twentieth century's most dramatic medical moment unfolded.