The Brandywine River Museum in Chadds Ford hosts a concert by the Jasper String Quartet on May 15 at 7:30 p.m., featuring works by Beethoven and Benjamin Britten. The galleries will open at 6 p.m. Through May 12, admission is $15 ($12 for members; $6 for students).  After May 12, admission is $25 ($20 for members; $10 for students). Full bar and small plate offerings will be sold. Call 610-388-8326 or visit www.brandywinemuseum.org.