From July 24^th to August 2^nd , in the splendid setting of the Chiostro di S. Agostino in Pietrasanta (LU), the “Pietrasanta in Concerto” international festival of chamber music returns, directed by Michael Guttman.     The programme is available at www.pietrasantainconcerto.com and on Facebook and Twitter. On Sunday, August 2^nd, “The Labèque sisters: Four hands, two souls: an historic duo.”