- The Caodaism Holy See are in the province of Tay Ninh, which is about 100 kilometers northwest of Saigon. The Holy City, area of about 20,328 hectares divided into 18 sections or neighborhoods administered by the Church. The Holy See is the site of the Main Temple (Den Thanh), the main administrative offices, residences for high dignitaries and adepts working on the grounds, a hospital, a school, an orphanage, a home for the aged  and other major facilities.

- In his novel “The Quiet American,” Graham Greene described the temple as the “Walt Disney Fantasia of the East”. The eye over the main entrance and on the inside ceiling is characteristic of every Cao Dai church, and is a reminder of the Creator of the Universe. Yet, the midday mass is very solumn and respectful. Today, the Caodaism numbers over 2 million members, who are vegetarians, obey the rules of chastity, and lead very simple lives helping the sick and the infirm.  They are known for their séances and communications with the spirit world.