Children raised in cults often develop a variety of psychiatric and physical ailments.
Much of the iconography comes from Japan, where a popular cult especially devoted to him has developed.
At some time after her death, a cult developed around her tomb.
So many people came to see him that G'Kar felt a cult of personality had developed.
I think a better question might be when did the cult develop their interest?
I don't think a cult of personality will develop until someone has won something.
A cult developed, and the boy was canonized in 1820.
A cult around Birutė developed and remained strong long after her death.
It was therefore only natural that a cult of personality developed around the man who was the first in space.
A cult of wilderness even developed; all that is human became seen as an intrusion.