Simplify the following text for a Grade 10 native English-speaking person.
Original: His sister , Anna Maria Luisa de ' Medici , the Electress Palatine , married him to Anna Maria Franziska of Saxe-Lauenburg , a wealthy widow , in 1697 .
Simplified: His sister , Anna Maria Luisa de ' Medici , the Electress Palatine , married him to Anna Maria Franziska of Saxe-Lauenburg in 1697 .