Granada.

The political situation created by the Queen's death was both
perplexing and menacing.[2] Doña Juana, wife of the Archduke Philip,
inherited the crown of Castile from her mother in default of male
heirs, but her mental state excluded the possibility of her assuming
the functions of government. Already during her mother's lifetime, the
health of this unhappy princess, who has passed into history under the
title of Juana the Mad, gave rise to serious anxiety. Deserted by the
handsome and frivolous Philip at a time when she most required his
presence, she sank into a state of profound melancholy. She waited, in
vain, for the return of the husband whom her unreasoning jealousy and
amorous importunities had driven from her.

[Note 2: The Infante Don Juan died in October, 1497, shortly after
his early marriage with the Archduchess Margaret of Austria, and
without issue. Isabella, Queen of Portugal, died after giving birth to
a son, in whom the three crowns of Portugal, Castile, and Aragon would
have been united had the prince not expired in 1500, while still a
child. Doña Juana, second daughter of Ferdinand and Isabella and next
heir, had married, in 1496, the Archduke Philip of Austria, Duke of
Burgundy, and became the mother of Charles I. of Spain, commonly known
by his imperial title of Charles V.]

In conformity with the late Queen's wishes, Ferdinand hastened to
proclaim his daughter and Philip sovereigns of Castile, reserving to
himself the powers of regent. He was willing to gratify the archduke's
vanity by conceding him the royal title, while keeping the government
in his own hands, and had there been no one but his absent son-in-law
with whom to reckon, his policy would have stood a fair chance of