All Souls (2001)

"Evil has taken residence."

In a Boston hospital, All Souls Hospital, Dr. Mitchell Grace tries to discover the truth about the haunting that date as far back as the Civil War. The hospital's lower levels, once a mental asylum, are haunted by ghosts of dead patients, including Lazarus, an orderly who has been benevolently haunting the hospital since his days working with Dr. Ambrosius after the Civil War.