She has an interesting history; her Wikipedia article is here. She was a devout Catholic and it was during her marriage to Louis XIV that he revoked the Edict of Nantes. This ended religious tolerance for Protestants and caused the hemorrhage of thousands of Protestants to nearby Protestant nations and regions. Her role in this, according to her Wikipedia article, is uncertain. She established the Maison Royale de Saint-Louis, a boarding school for girls from impoverished noble families. She was gracious to Queen Marie-Therese, in contrast to the Marquise de Montespan.
According to Wikipedia, Maintenon is part of the Paris metropolitan area.