Question: Italian composer Donizetti's opera "Maria Stuarda" is based on a play by Friedrich Schiller about the final das of which royal figure?
Related documents: [0]  [DOC] Mary Stuart (German: "Maria Stuart" ) is a verse play by Friedrich Schiller that depicts the last days of Mary, Queen of Scots. The play consists of five acts, each divided into several scenes. The play had its première in Weimar, Germany on 14 June 1800. The play formed the basis for Donizetti's opera "Maria Stuarda" (1835). [END] 
[1]  [DOC] Domenico Gaetano Maria Donizetti (] ; 29 November 1797 – 8 April 1848) was an Italian composer. Along with Gioachino Rossini and Vincenzo Bellini, Donizetti was a leading composer of the "bel canto" opera style during the first half of the nineteenth century. Donizetti's close association with the bel canto style was undoubtedly an influence on other composers such as Giuseppe Verdi (1813–1901). [END] 
Answer: 
Mary, Queen of Scots
Mary, Queen of Scots