Claim: Felice Varesi, a Swiss-born Italian baritone with an illustrious singing career that began in the 1830s, began his career in Varese in 1834 and only 10 years later, he sang he sang the role of Don Carlo in Ernani at Padua, his initial Verdi opera, and later appeared as the Doge in Verdi's I due Foscari.
Evidence: Felice Varesi (born Calais, 1813 – died Milan, 13 March 1889) was a French-born Italian baritone with an illustrious singing career that began in the 1830s and extended into the 1860s.