The festival features the music and dance of Ireland, Scotland, Wales, Brittany, Cornwall and the Isle of Man.For six days the cream of Celtic culture will be celebrated across the city.Event manager, Odhrán Mullan, told UTV: "(Visitors can) look forward to a full jam packed week of events with the theme of Celtic culture."The kick-off is on Tuesday morning (and) we have family events every day from 11am to 3pm with the likes of Armagh rhymers, arts and crafts, treasure hunts and stuff from the morning time and then the main events kick off from half seven on Tuesday night and follow right through till Sunday the 27th."One of the biggest attractions will be world-famous travelling venue the Spiegletent which has been erected in the Guildhall Square.From the outside it looks like a circus tent but it actually boasts a plush interior, including a hall of mirrors and stained glass.The Spiegletent has toured arts events around the world - from Barcelona to New York and Australia.As the festival gets underway, police have said they will be approaching the event in the same spirit as the last year's successful City of Culture and Fleadh.Chief Inspector Jon Burrows, the Foyle Area Commander, said: "For Derry to get another high profile cultural event shows how highly regarded the city is, and the confidence that people have in it. I am sure the people of the city will make visitors welcomeCHAR(13) + CHAR(10) CHAR(13) + CHAR(10)"Our policing style will be a low-key one. I envisage that we will be there to assist with the parade and traffic arrangements. Our neighbourhood officers will be to the fore.CHAR(13) + CHAR(10) CHAR(13) + CHAR(10)"We hope to see a large number of people enjoying themselves at the event and our request to them is to take their lead from the organisers and the stewards."During the festival motorists are advised to be aware of the larger pedestrians numbers in the city and to take extra care.Visitors are also being asked to make plans for travelling to and from the venues and for groups to stay together safely at all times.