No. He was a proud Catholic and oversaw the persecution of Protestants in all Habsburg Territories (Spain, Austria, Hungary, Netherlands, Belgium, etc.).
I'm assuming you mean King Charles I... he was protestant.
Protestant
Protestant.
Protestant
Protestant Movement
Charles Morell Watson has written: 'Protestant crusaders'
Charles Wheeler Iglehart has written: 'A century of Protestant Christianity in Japan' -- subject(s): Church history, Missions, Protestant churches
Charles the Fifth
Protestant
Holy Roman Emperor Charles V is known for his opposition to the Protestant Reformation. His non-violent measures saved Spain from much for the religious conflict going on at this time.
He was a Protestant all his life until on his death bed, when he chose to convert to Catholicism. A priest was smuggled into the palace he was in.
Charles 1, Was a protestant, But She was a catholic.