Robert Charles Sproul, is a prominent American Calvinist theologian, author

Author

An author is broadly defined as "the person who originates or gives existence to anything" and that authorship determines responsibility for what is created. Narrowly defined, an author is the originator of any written work.-Legal significance:...

, and pastor

Pastor

The word pastor usually refers to an ordained leader of a Christian congregation. When used as an ecclesiastical styling or title, this role may be abbreviated to "Pr." or often "Ps"....

 of the Reformed tradition. He is the founder and chairman of Ligonier Ministries

Ligonier Ministries

Ligonier Ministries is a Reformed international Christian organization headquartered in the greater Orlando, Florida area. Founded by R. C. Sproul in the Ligonier Valley, Pennsylvania outside of Pittsburgh over forty years ago, Ligonier's stated purpose is "to awaken as many people as possible to...

 (named after the Ligonier Valley

Ligonier Valley, Pennsylvania

Ligonier Valley is a valley in Westmoreland County, Pennsylvania, United States.Around 1727 the first Indian settlement was made in the Ligonier Valley, near the confluence of Mill Creek and Loyalhanna Creek...

 just outside of Pittsburgh, where the ministry started as a study center for college

College

A college is an educational institution or a constituent part of an educational institution. Usage varies in English-speaking nations...

 and seminary

Seminary

A seminary, theological college, or divinity school is an institution of secondary or post-secondary education for educating students in theology, generally to prepare them for ordination as clergy or for other ministry...

 students) and can be heard daily on the Renewing Your Mind radio broadcast in the United States and internationally.