The Summer Concerts at Saint-Germain bring internationally acclaimed artists each Sunday and Monday from July through September, offering a diverse program spanning centuries of music. The Terpsycordes Quartet, a staple of the Geneva music scene since winning First Prize at the Geneva Competition in 2001, partners with four guest musicians to create a temporary octet for the season. The ensemble will perform Janáček’s “String Quartet No. 2 ‘Intimate Letters’” and Enesco’s “Octet for String Instruments.” Admission is free, with donations gladly accepted.