Waldo Vieira (Portuguese: [ˈvawdu viˈejɾa]) (April 12, 1932 – July 2, 2015) was a Brazilian spiritual author, medium, physician and dentist who founded the spiritual movements of Conscientiology and Projectiology.
[3] In 1955, he met the famous Brazilian medium Chico Xavier and the two co-authored several books on Spiritism, founded their Spiritist centre,[2] practiced philanthropy[4][5][6] and did voluntary medium work, including psychographies.
Around 1966, he became a dissident Spiritist, developing his own views on the subject and stopping to work with Xavier.
He then began studying themes related to parapsychology, like astral projections and altered states of consciousness.
His books were translated into English, Spanish, Italian, German[8] and Chinese.