Simplify the following text for a Grade 10 native English-speaking person.
Original: Queen Silvia of Sweden ( born Silvia Renate Sommerlath ) ( born 23 December 1943 in Munich , Germany ) is the Queen consort of King Carl XVI Gustaf , Sweden 's monarch , and the mother of the heir apparent to the throne , Crown Princess Victoria .
Simplified: Queen Silvia of Sweden ( nÃ e Silvia Renate Sommerlath ; born 23 December 1943 ) is the Queen consort of King Carl XVI Gustaf of Sweden . Styled Her Majesty The Queen , Silvia is the mother of the heir apparent to the throne , Crown Princess Victoria .