Question: When did Princess Maria Pia Of Bourbon-Two Sicilies (1849–1882)'s husband die?
Sentence (from "Princess Maria Pia of Bourbon-Two Sicilies (1849–1882)"): Maria Pia of the Two Sicilies (2 August 1849 – 29 September 1882) was a Princess of the Two Sicilies and titular Duchess consort of Parma as the wife of Robert I, Duke of Parma.
Relevant evidence: Yes