Halsbandaffäre
In 1770 Marie Antoinette, future queen of France, on her way from Vienna to Paris passed through the Alsatian capital, where she stayed at the Episcopal Palace, the Palais Rohan. Richter, who almost certainly directed the church music when Marie Antoinette went to mass the next day, witnessed the earliest stages of historical events that would later contribute to the downfall of the French monarchy. The prelate who greeted Marie Antoinette on the steps of the cathedral, probably in Richter's presence, was the same Louis Rohan who would later, duped by a prostitute impersonating Marie Antoinette, trigger the Affair of the Diamond Necklace. Several historians and writers think that this bizarre episode undermined the trust of the French in their queen and thus hastened the onset of the French Revolution.