In October 1517, seventeen-year-old Charles I arrived in Asturias at the Bay of Biscay. On 4 November, he and his sister Eleanor met their mother Joanna at Tordesillas – there they secured from her the necessary authorisation to allow Charles to rule as her co-King of Castile and León and of Aragon. Despite her acquiescence to his wishes, her confinement would continue. The Castilian "Cortes", meeting in Valladolid, spited Charles by addressing him only as "Su Alteza" ("Your Highness") and reserving "Majestad" ("Majesty") for Joanna. However, no one seriously considered rule by Joanna a realistic proposition.