The Tailteann Games, Tailtin Fair, Áenach Tailteann, Aonach Tailteann, Assembly of Talti, Fair of Taltiu or Festival of Taltii 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 Tailteann in County Meath. A significant historical site in the area was destroyed by a local resident whilst extending her garden 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.
The event was held during the last fortnight of July and culminated with the celebration of Lughnasadh, or Lammas Eve (1 August). Modern folklore claims that the Tailteann Games started around 1600 BC, with some sources claiming as far back as 1829 BC. Promotional literature for the Gaelic Athletic Association revival of the games in 1924 claimed a later date of their foundation in 632 BC. The games were known to have been held between the 6th and 9th centuries AD. The games were held until 1169-1171 AD when they died out after the Norman invasion.