Entering into its third week, Bay Chamber's Summer Concert Series will present several timeless and well-loved pieces Thursday, July 24, at 7:30 p.m. at the Rockport Opera House, 6 Central St. The following evening, July 25, the featured musicians will perform an all-Schumann program as a 21-and-older Friday Café Concert beginning 9 p.m. at Union Hall, 2 Central St.

Violinist Elissa Lee Koljonen and the faculty of the prestigious Curtis Institute will open Thursday’s with Antonio Vivaldi's best known work, “Le Quattro Stagioni (The Four Seasons).” Following this popular work will be Piazzolla's “Estaciones Porteñas,” four tangos sometimes called The Four Seasons of Buenos Aires. Each tango is a unique blending of the syncopations of the dance, Bach-like counterpoint, touches of Romantic and Impressionistic music and jazz.

Recognized as one of the most celebrated violinists of her generation, Koljonen has thrilled audiences and critics in more than 100 cities throughout the world. She initially received international acclaim when she became the first recipient of the prestigious Henryk Szeryng Foundation award and silver medalist of the Carl Flesch International Violin Competition. Koljonen is a protégé of the great Aaron Rosand at the Curtis Institute of Music. Through his influence, she continues the legacy and tradition of Auer and his legendary school of violin playing.

The students and faculty of the Curtis Institute will return Friday to perform an intimate concert in the beautifully renovated Union Hall. Philadelphia’s Curtis Institute of Music educates and trains exceptionally gifted young musicians for careers as performing artists on the highest professional level. The Friday night program will open with Robert Schumann’s Violin Sonata No. 1 in A Minor, Op. 105, rarely heard in the concert hall. Following will be Five Pieces in Folk Style for Piano and Cello, Op. 102; and the beloved Piano Quartet in E Flat Major.

Thursday tickets are $45, $10 younger than 21; and 21-and-older-only Friday tickets are $35. They can be purchased in advance by calling 236-2823 or by stopping by Bay Chamber Concerts and Music School, 18 Central St. Tickets also are available in limited quantities at the door prior to concerts. To avoid a $5 per order fee, purchase online at baychamberconcerts.org.

Courier Publications’ A&E Editor Dagney C. Ernest can be reached at (207) 594-4401, ext. 115; or dernest@courierpublicationsllc.com.