Kolb von Wartenberg, called "the Kolbin", instructed her against "any hatred or prejudice against someone because they belong to a different religion". This religious tolerance was quite unusual in its time and stemmed from the relatively relaxed attitude of her father Charles I Louis, who was a Calvinist himself, but had a built in Mannheim a Concordia church (Konkordienkirche), where the followers of the Calvinist (or Reformed), Lutheran and Catholic denominations could celebrate their rituals. Liselotte benefited from this relatively open religious attitude throughout her life; she had learned about the Lutheran denomination at court in Hanover and, decades later, she still knew how to sing Lutheran chorals by heart. Before her marriage, she was required to convert to the Catholic faith for dynastic reasons, though she remained skeptical of dogmatism throughout her life, and was often critical of "the priests", even while attending mass on a daily basis. She remained convinced of the Calvinist doctrine of predestination and was critical of the Catholic veneration of the saints. Etienne Polier, her first stable master and steward, became a lifelong confidante, whom she took with her to France after her marriage and who remained in her service for life. Marriage Liselotte was married in 1671 to the brother of King Louis XIV of France, Philippe I, Duke of Orléans, known as "Monsieur", the title given to the eldest brother of the King under the Ancien Régime. As wife of the Duke of Orléans, Liselotte assumed the style of Madame. This political union was conceived by Anna Gonzaga, Liselotte's aunt (as widow of Edward, Count Palatine of Simmern, Charles I Louis' younger brother) and an old friend of the Duke of Orléans; she negotiated the marriage contract, including the terms surrounding Liselotte's required conversion to Catholicism. Anna escorted Liselotte from Heidelberg to Paris. The wedding per procurationem took place on 16 November 1671 at the Cathedral of Saint Stephen in Metz by Bishop Georges d'Aubusson de La Feuillade; in representation of the groom was the Duke of Plessis-Praslin. The day before, she solemnly renounced her old Reformed faith and converted to the Roman Catholic faith. She met her husband, who was 12 years her senior, for the first time on 20 November 1671 in Châlons. Until her husband's death in 1701, she resided in her own apartments in her husband's residences, the Palais Royal in Paris, and the Château de Saint-Cloud. The