When it comes to royal families around the world, maintaining the purity of age-old lineage and ensuring the peace inside the family comes at a high price. For eons, royals have been marrying their own cousins and relatives so as to strengthen the relationship within the family and/or to build up a stronger political alliance.

When it comes to royal families around the world, maintaining the purity of age-old lineage and ensuring the peace inside the family comes at a high price. For eons, royals have been marrying their own cousins and relatives so as to strengthen the relationship within the family and/or to build up a stronger political alliance.