Brings to light the long-lost original version of Velázquez’s portrait of Cardinal Gaspar de Borja, which enhances our understanding of the artist’s work and legacy This book delves into the study of the portrait of Cardenal Gaspar de Borja , painted by Diego Velázquez around 1645. It reveals the true and original version of this portrait, a masterpiece that had long been assumed to exist but was only known through versions by Velázquez’s followers. It focuses on the rich historical and technical aspects of the portrait, examining its attribution and the various versions of the work that have existed throughout history. The book provides a comprehensive analysis of the portrait's journey, its rediscovery, and the technical methods employed in Velázquez's execution of the piece. It presents a scholarly investigation that combines art history, technical analysis, and restoration studies, shedding new light on the portrait of Cardenal Gaspar de Borja and confirming its place as a true masterpiece by Velázquez. It represents a groundbreaking contribution to the history of art, as it brings to light the long-lost original version by Velázquez, a discovery that significantly enhances our understanding of his work and legacy.