The DaPonte String Quartet continues its 25th summer season with Then and Now, a  seven-concert series that gallops through classical music from its earliest foundations to a fresh, hot-off-the presses contemporary work.

The series opened July 23 in Richmond and runs through Aug. 13. The Midcoast concert will take place Tuesday, Aug. 2, at 7:30 p.m. at the Ocean View Grange Hall, 435 Port Clyde Road/Route 131, Martinsville; tickets are $25, free for those younger than 21.

The varied program includes a world premiere commissioned by the DaPonte String Quartet and/or works by Bach, Beethoven and Mendelssohn. The differing selections of Then and Now include the world premiere of Dutch-born composer Rocco Havelaar’s Quartet No. 3; J.S. Bach’s Three Contrapuncti from The Art of Fugue; Beethoven’s Op. 59 No. 2; and Felix Mendelssohn’s Op. 13 (one of two works featured on the DSQ’s soon-to-be released CD). The local performance will include the Havelaar, Bach and Mendelssohn works.

The Then and Now tour dates and sites are as follows: July 23 (minus the Havelaar), 2 p.m. at the Dresden-Richmond United Methodist Church; July 26, 7 p.m. at the Burnt Cove Church Community Center in Stonington; Aug. 2, 7:30 p.m. at Ocean View Grange in Martinsville; Aug. 4, 7:30 p.m. at the Union Church, South Bristol; Aug. 9, 7:30 at Centennial Hall, Harpswell; Aug. 10, 7:30 p.m. at Coastal Maine Botanical Gardens, Boothbay; and Aug. 13, 7 p.m. at the Chebeague Island Methodist Church. For tickets and more information, call 529-4555 or visit daponte.org.

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