Dove – Symbol of Peace, Purity, Hope, Tenderness, and the Holy Spirit
Doves, usually white in color, are used in a lot of settings as symbols of love, peace or as messengers.
In Christian Iconography, a dove also symbolizes the Holy Spirit, in reference to Matthew 3:16 and Luke 3:22 where the Holy Spirit is compared to a dove at the Baptism of Jesus.
Few symbols have a tradition as long and as rich as the dove. A particular favorite in art and iconography, the dove often represents some aspect of the divine, and its use has been shared, adapted and reinterpreted across cultures and millennia to suit changing belief systems. From the ancient world to modern times, this simple bird developed layer upon layer of meaning and interpretive significance, making it a complex and powerful addition to religious texts and visual representations. (Source)