This summer, Cecilia Bartoli will devote herself to a sacred program. She has chosen not only works by a composer she especially cherishes, Antonio Vivaldi, but also music by Giovanni Battista Pergolesi, the “angelico maestro,” as Vincenzo Bellini called him. For Pergolesi, whose compositions sound like a promise of the future and in some moments already anticipate Mozart or Schubert, was only 26 when he completed his celebrated Stabat Mater a few weeks before his death in March 1736. That work is the focus of Bartoli’s concert with her ensemble Les Musiciens du Prince-Monaco led by Gianluca Capuano. Unlike the recording from the early years of her career, this time Bartoli takes the higher of the two vocal parts – for the lower one, she has invited the countertenor Carlo Vistoli, who previously appeared at Lucerne Festival in John Eliot Gardiner’s Monteverdi trilogy. Together they will make Pergolesi’s simple and songful cantilenas blossom – melodies that do not seek to overwhelm the listener with artistry, going all the deeper and straight to the heart.