Thalia Symphony Orchestra

Seattle Youth Symphony Orchestras ( SYSO ) is the largest youth symphony organization in the United States. Founded in 1942, we now serve over 1, 100 diverse students a year through four full orchestras, three summer programs, and partnerships with local public schools. Through our financial aid programs, we make sure that every talented child can receive an excellent music education, regardless of their financial resources. The Marrowstone Summer Festivals provide intensive learning environments to over 500 students each summer.