U.S. Christian evangelist Oral Roberts has died at the age of 91.

A spokesman said Roberts died in a hospital in Newport Beach, California Tuesday from complications related to pneumonia.

He founded Oral Roberts University in Tulsa, Oklahoma.

Roberts said he had heard the voice of God telling him to build a university while he was a young man on the way to a religious service in hopes of being cured of tuberculosis.

After being cured of the disease, Roberts built an evangelical empire based on Christian healing. He took his message to television in the 1950s, helping to found the field of televangelism.

Some information for this report was provided by AP.