The piece of art you are describing is likely a depiction of the "Christ in the Field" mosaic, which comes from early Christian art, particularly associated with the Byzantine period. One notable example is the "Mosaic of the Good Shepherd" found in the tombs of early Christians.
Religious Connection:
This artwork is connected to early Christian iconography, symbolizing themes of salvation, pastoral care, and the relationship between Christ and His followers. The large cross represents the central tenet of Christianity — the crucifixion and resurrection of Jesus Christ. The man with a halo signifies holiness and divinity, often interpreted as Christ Himself or a saint. The presence of animals and trees emphasizes the connection between God’s creation and humanity, reflecting Psalm 23's imagery of Christ as the Good Shepherd.
Color:
The color palette in such mosaics typically features vibrant hues of gold, blue, green, and terracotta. Gold is often used to symbolize divinity and glory, while blue may represent the heavens. Earthy tones like green and brown connect the scene to the natural world and the pastoral life reflected in biblical stories.
Content:
The composition involves a large cross placed within a circle, symbolizing eternity and the promise of salvation. Surrounding it is the depiction of a man with a halo, often shown tending to sheep or interacting with other creatures, conveying Christ's role as protector and caretaker. The field signifies life and abundance, while trees represent growth and divine creation. The two figures in the sky may symbolize angels or saints, highlighting the heavenly realm’s connection to the earthly scene.
This artwork reflects the beliefs and values of early Christians, emphasizing themes of faith, community, and the promise of eternal life.