Dorothea von Salviati's father-in-law was born on what date?
Dorothea von Salviati Dorothea von Salviati (1907–1972), was the wife of Prince Wilhelm of Prussia, the eldest son of Crown Prince Wilhelm, the eldest son and heir of the last German Emperor, Wilhelm II.
Princess Therese of Saxe-Altenburg "Teresia" Amalia Karolina Josefina Antoinetta of Saxe-Altenburg ("Thérèse"), (21 December 1836 – 9 November 1914), was a Princess of Sweden and Norway as the spouse of Prince August of Sweden & Norway, Duke of Dalarna.