Rothko Chapel will observe the International Day of Peace on Sept. 21 at 7:00 p.m. with a performance by the Grammy-award winning Silkroad Ensemble. Founded by internationally renowned cellist Yo-Yo Ma, Silkroad is comprised of musicians that represent dozens of nationalities and artistic traditions. They create music that embraces difference to create a more hopeful world. The performance is a pay-what-you-can program with a suggested donation of $20.00 per person. Rothko Chapel is located at 3900 Yupon at Sul Ross, Houston, 77006.