Quintetto Chigiano

The Quintetto Chigiano (a.k.a. "Chigi Quintet") was an Italian musical ensemble comprising a string quartet with pianoforte, and was especially active during the 1940s–1960s.
Personnel.
The personnel of the Quintet were made up as follows:
Origins.
The Quintetto Chigiano was founded in Siena, Italy, in 1939 and took its name from the Accademia Musicale Chigiana, which was founded by Count Chigi-Saracini. It was one of the rare permanent quintets in the world. The Quintet had the use of the four best instruments from Count Chigi-Saracini's private collection, namely a Camillo Camilli and a Guadagnini violin, an Amati viola and a Stradivarius violoncello.
Performance.
The Quintetto Chigiano made its Boston debut in 1961 for the Peabody Mason Concert series. In 1957 they completed an acclaimed tour of Southern Africa 
Recordings.
The Quintet made several recordings for Decca Records:
Having played all these works, during the 1960s the Quintet reformed itself into a Sextet.