Robert Charles Sproul (born February 13, 1939) is an American Calvinist theologian, author, and pastor. He is the founder and chairman of Ligonier Ministries (named after the Ligonier Valley just outside Pittsburgh, where the ministry started as a study center for college and seminary students) and can be heard daily on the Renewing Your Mind radio broadcast in the United States and internationally."Renewing Your Mind with Dr. R.C. Sproul" is also broadcast on Sirius and XM satellite radio.In late July 2012, a new Christian internet radio station called RefNet (Reformation Network) was also announced by Ligonier Ministries in an effort to reach "as many people as possible" where Internet access is available.
Ligonier Ministries hosts several theological conferences each year, including the main conference held each year in Orlando, FL, at which Sproul is one of the primary speakers.