The 1176 Cardigan eisteddfod, as it is commonly described, was a cultural tournament involving bards and musicians, held in the grounds of Cardigan Castle, Cardigan, West Wales, by the Lord Rhys ap Gruffydd. Though the term eisteddfod was not commonly used until several centuries later, the 1176 gathering is commonly claimed to be the earliest recorded forerunner of the modern national eisteddfod event.

Cardigan Castle is a castle overlooking the River Teifi in Cardigan, Ceredigion, Wales. It is a Grade I listed building. The castle dates from the late 11th-century, though was rebuilt in 1244. Castle Green House was built inside the castle walls in the early 1800s. After falling into disrepair the castle was restored in the early 2000s and opened to the public in 2015. It is owned by Ceredigion County Council and now includes a heritage centre and open-air concert facilities. The castle's gardens are listed on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales.