throughout the week. Sessions include Bible classes, as well as classes dealing with current issues and personal growth. Lectures, conferences, and seminars are frequently hosted, including meetings of the National Capital Presbytery and the Reformed Institute. The Children's Sunday School includes preschool, elementary and youth group classes. Child care is also provided. The church also houses archives of historical documents, and contains a library with a full range of theological and historical books. Caring ministries The congregation and staff support numerous caring ministries, both in the local area and at many locations around the globe. They include: Local/regional outreach: food and hunger relief (Martha's Table and Central Union Mission), housing (Habitat for Humanity), youth services (Unique Learning Center), and social services (Community Council for the Homeless at Friendship Place) International missions Care, connection and support to congregants through a variety of ministries from Deacons and Stephen Ministers to hospital visits and prayer opportunities. Referrals are made to partner ministries such as GriefShare and DivorceCare as well as to professional counselors. Other programs include small groups, men’s ministry, women's ministry, older adult fellowship, children's and youth ministries and the Board of Deacons. Music ministries The 1,000-seat main sanctuary has superb acoustics and one of the largest pipe organs in Washington, D.C. It accommodates a variety of musical styles in its worship and concerts. It also is a highly a sought-after venue for many visiting musical groups from the Washington, D.C. area and around the world. The church’s own musical organizations include: Chancel Choir: helps lead worship singing at the traditional Sunday morning services and during special performances during the Christmas and Easter seasons or other times of the year. The choir includes both volunteers and professional artists. Festival Choir: performs larger choral works with orchestra and usually around 100 singers drawn equally from both the congregation and the larger community. Contemporary Band: a keyboard based ensemble of singers and instruments such as guitar, bass, and drums helps lead the contemporary Sunday service. Concert Series The church is home to the “Music at National” concert series featuring many major arts organizations for their subscription series and special events. Regulars include the Washington Bach Consort, the City Choir of Washington, Washington Master Chorale, the Washington Chorus, Choralis, the United States Army Chorus, the U. S. Navy Sea Chanters, and the Children’s Chorus of Washington. Some of the nation’s leading college and university choruses