Robert H. Schuller’s ministry—including the architectural wonder of the Crystal Cathedral and the polished television broadcast of Hour of Power—cast a broad shadow over American Christianity. Pastors flocked to Southern California to learn Schuller’s techniques. The President of United States invited him sit prominently next to the First Lady at the State of the Union Address. Muhammad Ali asked for the pastor’s autograph. It seemed as if Schuller may have started a second Reformation. And then it all went away. As Schuller’s ministry wrestled with internal turmoil and bankruptcy, his emulators—including Rick Warren, Bill Hybels, and Joel Osteen— nurtured megachurches that seemed to sweep away the Crystal Cathedral as a relic of the twentieth century. How did it come to this? The Glass Church examines the spectacular collapse of The Crystal Cathedral to better understand both the strength and fragility of Schuller’s ministry. The apparent success of the ministry obscured the many tensions that often threatened its future.