Pennsylvania Sinfonia Orchestra presents the last of its four Valley Vivaldi summer 2014 chamber ensemble concerts, 7:30 p.m. Aug. 17, Wesley Church, 2540 Center St., Bethlehem.

The program opens with a work for viola and strings by Georg Telemann, in which Agnès Maurer has the solo.

Guest guitarist Zachary Grim has the solo role in the Concerto in D for guitar and strings by Antonio Vivaldi. Cellist Deborah Davis will be featured in Giuseppe Tartini's Concerto in A for cello and strings.

In the final piece, violinist Mary Ogletree, oboist Cheryl Bishkoff and their colleagues will perform J.S. Bach's Concerto in C minor for violin, oboe and strings.

Concert-goers are invited to meet and converse with the musicians at a post-concert reception.

Tickets are expected to be available at the door, and PASinfonia.org, 610 434-7811