Given a reference text about Easter eggs, tell me what they are, what they symbolize, and where they originated from?

Context: Easter eggs, also called Paschal eggs, are eggs that are decorated for the Christian feast of Easter, which celebrates the resurrection of Jesus. As such, Easter eggs are common during the season of Eastertide. The oldest tradition, which continues to be used in Central and Eastern Europe, is to use dyed and painted chicken eggs.

Although eggs, in general, were a traditional symbol of fertility and rebirth, in Christianity, for the celebration of Eastertide, Easter eggs symbolize the empty tomb of Jesus, from which Jesus was resurrected. In addition, one ancient tradition was the staining of Easter eggs with the colour red "in memory of the blood of Christ, shed as at that time of his crucifixion."

This custom of the Easter egg, according to many sources, can be traced to early Christians of Mesopotamia, and from there it spread into Eastern Europe and Siberia through the Orthodox Churches, and later into Europe through the Catholic and Protestant Churches. Additionally, the widespread usage of Easter eggs, according to mediaevalist scholars, is due to the prohibition of eggs during Lent after which, on Easter, they have been blessed for the occasion.

A modern custom in some places is to substitute chocolate eggs wrapped in coloured foil, hand-carved wooden eggs, or plastic eggs filled with confectionery such as chocolate.

Answer: Easter eggs are decorated eggs celebrating the Christian holiday of Easter. They symbolize the empty tomb of Jesus. They originated in Mesopotamia.