It is well known that Queen Juana I of Castile was unable to assume power when she inherited the kingdoms of her mother, Isabella the Catholic, in 1504. The successive spoliations of her power have already been studied by historians. However, little is known about the nuances of these "blows" against his legitimacy to rule. Looking at Juana's royal and legal status in the Iberian Peninsula would allow us to understand how the seizures of power by her husband, Philip the Fair, her father, Ferdinand of Aragon, and her son, Charles V, came about. Through the official documents of Castilian diplomacy and government, we will attempt to move away from prejudices about the discarded queen and analyse both her presence and her absence on the Spanish and European political scene. In an unprecedented political context in which the legitimate sovereign was still alive, her change of title is an object of interest when considering the dynastic, political and diplomatic implications of the rule of the invisible queen.