Original: After Philip 's death in 1506 , with Joanna supposedly mentally unstable , and her and Philip 's son Charles I of Ghent was only six years old , Ferdinand resumed the regency , ruling through Francisco Jiménez de Cisneros , the Chancellor of the Kingdom .
Simplified: After Philips death in 1506 , with Joanna mentally unstable , and her and Philips son Charles of Ghent only six years old , Ferdinand resumed the regency , ruling through Francisco Cardinal Jimenez de Cisneros , the Chancellor of the Kingdom .