The Tailteann Games, Tailtin Fair, Áenach Tailteann, Aonach Tailteann, Assembly of Talti, Fair of Talti or Festival of Talti were funeral games associated with the semi-legendary history of Pre-Christian Ireland.
There is a complex of ancient earthworks dating to the Iron Age in the area of Teltown where the festival was historically known to be celebrated off and on from medieval times into the modern era.
The games were founded, according to the Book of Invasions, by Lugh Lámhfhada, the Ollamh Érenn (master craftsman or doctor of the sciences), as a mourning ceremony for the death of his foster-mother Tailtiu. Lugh buried Tailtiu underneath a mound in an area that took her name and was later called Teltown in County Meath. Part of one of the mounds in the area called the Knockauns was partially destroyed by bulldozers for urbanization in 1997. John O'Donovan claimed that loughs near a fort in the area called the Rath Dhubh "have the appearance of being artificial lakes and may have been used when the Olympic Games of Tailteann were celebrated by the Irish." He also mentions a tradition that the shade of Laogaire, the King of Tara, was imprisoned by Saint Patrick until Judgement Day to the east of Rath Dhubh in the Dubhloch.