In paintings of the crucifixion we often see an eclipse, which makes sense because in the Bible it says that a solar eclipse takes place at the moment Jesus dies:
And it was about the sixth hour, and darkness came over all the earth until the ninth hour. And the sun was darkened, and the veil of the temple was rent in the middle. And Jesus cried with a loud voice and said, Father, into Your hands I commend my spirit. And when He said that, He gave up the ghost. (Luke 23: 44-46)
The detail of the eclipse in this quote is intended to tell us that the death of Jesus, on the symbolic level, represents a spiritual transformation process. A complete solar eclipse can only occur at New Moon. However, it was Full Moon (Pesach) when Jesus was crucified. The sixth hour is a reference to the sixth chakra, the place where the fusion of the polarities (sun and moon) takes place.
We can deduce from the hand of Jesus who makes the sign of the sacred marriage (2 = 1), that the eclipse in the paintings below has an esoteric meaning.
Read more about the symbolism in the Bible in my book “Mary Magdalene, the disciple whom Jesus loved.”