This programme of Italian masterpieces is centred round the unaccompanied (or prima prattica) writing of Monteverdi, the anniversary of whose birth in 1567 is being celebrated. This a cappella style reached its zenith in the music of Palestrina and then acquired a more harmonic and even madrigalian focus, as shown in the Monteverdi works, a process which could go no further once in the hands of Gesualdo. Add to this Allegri’s Miserere – arguably the most famous piece of choral music in the world – and this promises to be an evening to savour.