Princess Sophie Friederike of Thurn and Taxis

Princess Sophie Friederike Dorothea Henriette of Thurn and Taxis, full German name: Sophie Friederike Dorothea Henriette, Prinzessin von Thurn und Taxis was a member of the House of Thurn and Taxis and a Princess of Thurn and Taxis by birth and a member of the House of Radziwiłł and Princess Radziwiłł through her marriage to Prince Hieronim Wincenty Radziwiłł. Sophie Friederike was briefly a member of the Kazanowski and Ostroróg Polish noble families through subsequent marriages. She was known as "the Jewel of Regensburg."