In 1623 , he convinced the 23 - year - old Charles that England should ally with Spain and that Prince Charles should marry a Spanish princess .
Buckingham had gained considerable influence , not only over James , but also over Prince Charles .
In 1623 , James convinced the 23 - year - old Prince Charles that England should ally with Spain and that Prince Charles should marry a Spanish princess .
Buckingham had gained considerable influence , not only over James , but also over Prince Charles .