The Eisteddfod is a celebration of which language?

In Welsh culture, an eisteddfod is a festival with several ranked competitions, including in poetry and music. The term eisteddfod, which is formed from the Welsh morphemes: eistedd, meaning 'sit', and fod, meaning 'be', means, according to Hywel Teifi Edwards, "sitting-together." Edwards further defines the earliest form of the eisteddfod as a competitive meeting between bards and minstrels, in which the winner was chosen by a noble or royal patron.

The first documented instance of such a literary festival and competition took place under the patronage of Prince Rhys ap Gruffudd of the House of Dinefwr at Cardigan Castle in 1176. However, the subsequent loss of Welsh independence at the hands of King Edward I, the closing of the bardic schools, and the Anglicization of the Welsh nobility made it fall into abeyance. The current format owes much to an 18th-century revival first patronized and overseen by the London-based Gwyneddigion Society and later co-opted by the Gorsedd Cymru, a secret society of poets, writers, and musicians founded by Iolo Morganwg whose beliefs were, "a compound of Christianity and Druidism, Philosophy and Mysticism."