Farinelli (Italian pronunciation: [fariˈnɛlli]; 24 January 1705 – 16 September 1782) was the stage name of Carlo Maria Michelangelo Nicola Broschi (pronounced [ˈkarlo ˈbrɔski]), a celebrated Italian castrato singer of the 18th century and one of the greatest singers in the history of opera. Farinelli has been described as having had soprano vocal range and as having sung the highest note customary at the time, C6.
Source : Wikipedia