Ichthys
Early Christian symbol of two intersecting arcs resembling a fish.
The ichthys or ichthus (from ancient Greek ΙΧΘΥΣ or ἰχθύς, 'fish') is a symbol consisting of two intersecting arcs, the right ends extending beyond the meeting point so as to resemble the profile of a fish. It is now known colloquially as the 'Jesus fish' and is widely used by Christians as a sign of their faith, often found on vehicles, necklaces, and laptop stickers.
- origin
- 2nd century
- popularity
- Late 2nd century, spread widely in 3rd and 4th centuries
- symbolic meaning
- Acronym for 'Ἰησοῦς Χρῑστός Θεοῦ Υἱός Σωτήρ' (Jesus Christ, God's Son, Savior)
- associated figures
- Augustine, Tertullian, Clement of Alexandria
- associated sites
- Catacombs of Saint Sebastian, Catacomb of Priscilla, Cappella Greca, Sacrament Chapels of catacomb of St. Callistus
- modern revival
- 1970s
Lore & Background
The first appearances of the ichthys in Christian art and literature date to the 2nd century. Its use among Christians had become popular by the late 2nd century, and it spread widely in the 3rd and 4th centuries. In early Christian history, the ichthys symbol held 'the most sacred significance.' It has been claimed that Christians used it to recognize churches and other believers during a time when they faced persecution in the Roman Empire. Augustine stated that a fish symbolized Jesus well, writing that 'he was able to live [...] without sin in the abyss of this mortality as in the depth of waters.' Additionally, the ichthys symbol references the sacraments of Baptism and Communion. Tertullian taught that just as water sustains fish, 'We, little fishes, after the image of our Ichthys, Jesus Christ, are born in the water.' The symbol is depicted in the Catacombs of Saint Sebastian and of the Catacomb of Priscilla, and is mentioned in the Greek text titled Oracula Sibyllina, with the specific acrostic appearing in Book 8, generally dated to the 2nd or 3rd century.
Reader's Guide
The ichthys symbol has been used by Christians since the 2nd century as a sign of faith and identity. Its significance is rooted in the acronym ΙΧΘΥΣ, which stands for 'Jesus Christ, God's Son, Savior.' The symbol also references key Christian sacraments: baptism, as Tertullian connected fish to water and new birth, and the Eucharist, linked to the miracle of the multiplication of the loaves and fishes. Fish appear multiple times in the Gospels, including Jesus calling his apostles 'fishers of men,' the feeding of the five thousand, and the post-resurrection meal of grilled fish. The idea that the ichthys was used as a secret symbol during Roman persecution is based on an argument from silence by Robert Mowat, but this connection has mostly fallen out of favor, as early Christian sources link it instead to baptism, the Eucharist, and the feeding of the multitude. In the 1970s, the 'Jesus Fish' rose in popularity as an icon of Christianity, and today it is commonly seen as a decal on automobiles or as jewelry.
Did You Know?
- The ichthys symbol is an acronym for 'Ἰησοῦς Χρῑστός Θεοῦ Υἱός Σωτήρ,' meaning 'Jesus Christ, God's Son, Savior.'
- Augustine wrote that the fish symbolized Jesus because 'he was able to live without sin in the abyss of this mortality as in the depth of waters.'
- The symbol appears in the Catacombs of Saint Sebastian and the Catacomb of Priscilla.
- The idea that the ichthys was a secret symbol during persecution is based on an argument from silence by Robert Mowat and has mostly fallen out of favor.
Frequently Asked Questions
What is the ichthys symbol?
The ichthys is an early Christian emblem formed by two crossing arcs whose right-hand ends extend past the intersection, giving the shape the appearance of a fish profile. It is commonly called the 'Jesus fish' today and appears on car bumpers, pendants, and laptop stickers as a marker of faith.
What does the ichthys acronym mean?
The Greek word ΙΧΘΥΣ functions as an acronym spelling out 'Jesus Christ, God's Son, Savior' (Ἰησοῦς Χρῑστός Θεοῦ Υἱός Σωτήρ). Each of the five letters corresponds to one word in that confession.
When and where did the ichthys symbol first appear?
The symbol dates back to the second century and gained broad circulation during the third and fourth centuries. It has been identified in several Roman catacombs, including those of Saint Sebastian, Priscilla, and St. Callistus, as well as in the Cappella Greca.
Which early Church Fathers are associated with the ichthys?
Tertullian, Clement of Alexandria, and Augustine are the early Christian writers most frequently linked to discussions of the fish symbol. Their references helped cement the ichthys as a recognized marker of Christian identity in the pre-Constantine era.
Why did the ichthys see a revival in the 1970s?
The symbol experienced a major resurgence in the 1970s, when it was adopted as a casual, low-key way for believers to display their faith in everyday settings. Its compact, recognizable shape made it ideal for stickers, jewelry, and vehicle decals during that decade.
More in Miscellaneous Philosophy And Religion 25-39
Elsewhere in the Miscellaneous Philosophy And Religion universe
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record