Around 30,000 people were estimated to have visited Derry as Fleadh Cheoil na hÉireann hit high notes on its final day.
All-Ireland competitions in music and song took place along with concerts and gigs late into the night.
City streets echoed to informal sessions with musicians and visitors from across the world joining forces with thousands from all over Ireland.
Organised by Comhaltas Ceoltóirí Éireann, the event is one of the world's biggest traditional music festivals.
The first All-Ireland Fleadh ever held north of the border has been hailed as a resounding success, involving people from both sides of the community.
Police chiefs say it is probably the biggest ever event staged in Derry.