Seven hundred and twenty-six plaster face casts of transsexual, non-binary or gender non-conforming people were unveiled yesterday in London’s Trafalgar Square. Mil Veces un Instante (A thousand times an Instant) by Mexican artist, Teresa Margolles, sits proudly upon the Fourth Plinth around Nelson’s Column. The casts are arranged in the form of a Tzompantli, or a ‘skull rack’, that exhibited the remains of war captives or sacrifice victims, and the art is intended to draw attention to the rights of trans people worldwide.