Graciela Rivera year she made her operatic debut as Rosina in "The Barber of Seville" by Gioachino Rossini at the New Orleans Opera. In December 1951, she became the first Puerto Rican to sing a lead role at the New York Metropolitan Opera as Lucia in the production of Lucia di Lammermoor. She earned accolades for her performance from critics around the world. In 1953, Rivera was proclaimed "Citizen of the Year" by the City of New York. In 1954 Rivera was featured as a guest singer in Name That Tune, and later that year, at an instance of Your Show of
Rossini Opera Festival established in 1980 with the aim of making the world more aware of Rossini's neglected operas and presenting all of them in collaboration with the G. Ricordi & Co. music publishing house, which published their critical editions. Of the approximately three dozen operas written, only a handful are regularly presented. On 13 August 1993, the Italian parliament unanimously approved the Special Law N. 319 "Regulations in support of the Rossini Opera Festival", which recognizes the Pesaro Festival's achievements in the reviving of Rossini's operas as entitled to be included among the state-supervised works of restoration of the national artistic heritage.