The Monument to the X-ray and Radium Martyrs of All Nations (also known as the X-ray Martyrs' Memorial) is a memorial in Hamburg, Germany, commemorating those who died due to their work with the use of radiation, particularly X-rays, in medicine.

[5][6] When unveiled, the memorial included 169 names,[3][5] from fifteen nations, listed alphabetically;[3][7] by 1959 there were 359,[3] with the additions listed on four separate stone plaques, beside the original columnar stone memorial.

[6] The memorial's inscription may be translated as:[7][1] To the Roentgenologists and radiologists of all nations, To the doctors, physicists, chemists, technicians, laboratory assistants and nurses who sacrificed their lives in the fight against disease.

They were valiant pioneers in the effective and safe use of X-rays and radium in medicine.

An accompanying book, Ehrenbuch der Radiologen aller Nationen (Book of Honour of radiologists of all nations) gives biographies of those commemorated.