Although not granted the title in her own right, the future Queen Mary I was, during her youth, invested by her father, King Henry VIII, with many of the rights and properties traditionally given to the Prince of Wales, including use of the official seal of Wales for correspondence. For most of her childhood, Mary was her father's only legitimate heir, and for this reason, she was often referred to as "the Princess of Wales", although Henry never formally created her as such. For example, Spanish scholar Juan Luis Vives dedicated his Satellitium Animi to "Dominæ Mariæ Cambriæ Principi, Henrici Octavi Angliæ Regis Filiæ".[10]