There were two monarchs of Spain that were also known as Charles
There was a Holy Roman Emperor named Charles V who was also King
of Spain from 1500-1558.
There was also a King of Naples named Charles V who was King of
Spain from 1661-1700.
King Charles 1st faced problems as the king and they are:-
He married a French women so if left her, she would probably
start a war with him
He fell out with Parliament
I know it's not much buit i !! Good luck Loopylollypop!! x x