
"He said that about noon, when the day was already beginning to decline, he saw with his own eyes the sign of a cross of light in the heavens, above the sun, and bearing the inscription, “By this symbol you will conquer.” He was struck with amazement by the sight, and his whole army witnessed the miracle." ChristianHistory

"The Miracle of the Sun (Portuguese: O Milagre do Sol) was an event which occurred on 13 October 1917, attended by a large crowd who had gathered near Fátima, Portugal in response to a prophecy made by three shepherd children that the Virgin Mary, referred to as Our Lady of Fatima, would appear and perform miracles on that date. Several newspaper reporters were in attendance and took testimony from many people who claimed to have witnessed extraordinary solar activity."
Wikipedia
Now the Spirit speaketh expressly,
that in the latter times some shall depart from the faith,
giving heed to seducing spirits,...
1 Timothy 4:1