What was the nickname of the princess that signed the Lei Áurea law?
Isabel, Princess Imperial of Brazil Dona Isabel (English: Isabella; 29 July 1846 – 14 November 1921), nicknamed "the Redemptress", was the heiress presumptive to the throne of the Empire of Brazil, bearing the title of Princess Imperial. She also served as the Empire's regent on three occasions.
Princess Antoinette of Anhalt Princess Antoinette of Anhalt (German: "Antoinette Anna Alexandra Marie Luise Agnes Elisabeth Auguste Friederike" ; 3 March 1885 – 3 April 1963) was a Princess of Anhalt by birth. As the wife of Prince Frederick of Schaumburg-Lippe, she became a Princess of Schaumburg-Lippe by marriage.