"Sophie Johanne Charlotte Crüwell, vicountess Vigier, stage name Sophie Cruvelli (12 March 1826 – 6 November 1907) was a German opera singer. She was a dramatic soprano who had a brief but stellar public career especially in London and Paris in the middle years of the 19th century. She was admired for her vocal powers and as a tragédienne. Both Verdi and Meyerbeer created operatic roles with the intention that she should first perform them." - (en.wikipedia.org 29.01.2020)