The 43rd International Pan Celtic Festival was launched in Derry on Tuesday evening at a ceremony in the Guildhall.
The festival celebrates the music, language and culture of the six Celtic nations of Ireland, Scotland, Wales, Britain, Cornwall, Brittany and the Isle of Man.
It is being held in Derry for the first time and will run until Saturday and is expected to attract thousands of visitors.
The festival was launched in the Guildhall at a ceremony attended by the Mayor of Derry, councillor Martin Reilly, Minister of State for the Gaeltacht, Dinny McGinley, Mayor of Buncrana, Peter McLaughlin, and President of the Pan Celtic Festival, Dave Crewes.
Con O’Conaill, chairperson of the International Committee of the Pan Celtic Festival, Gearoid O hEara, Chair of the local organising committee, and Eibhlin Ni Dhochartaigh
The festival itself began with the first of the Spiegeltent Sessions - a series of concerts held in the unique spiegeltent in Guildhall Square.
Goitse were the first group to play in the venue and other performers will include Declan O’Rourke, Barzaz, Mairtín O’Connor and Capercaille.
A festival Parade of Nations will take place through the city centre on Friday afternoon.
Details of events taking place are available at www.panceltic.ie.