Music in the Library: St Louis Classical Guitar St. Louis Classical Guitar is a non-profit arts agency whose mission is to promote positive impact through classical guitar performance and education. Founded in 1963 by students of George C. Krick, SLCG is the third oldest organization in the nation centered around classical guitar. Now in 2023, our 60th anniversary year, SLCG seeks to serve the St. Louis community through innovative, high-quality, and relevant programming.