Finally in 1642 the couple had another son named Cosimo de' Medici who was styled the Grand Prince of Tuscany. Under the influence of their mother, her children also received a deeply Roman Catholic education, and arguments between the Grand Ducal couple were sparked when there was a disagreement about the education of the Grand Prince.
In 1642, they had another son named Cosimo de' Medici who was styled the Grand Prince of Tuscany. Their mother's influence ensured a strong Roman Catholic upbringing for her children, and conflicts often arose between the Grand Ducal couple regarding the education of the Grand Prince.