Portuguese immigrants. However, in the past few decades immigration has been opened to include immigrants from all over the world, particularly those from former Northern and Western African colonies, as well as Southeast Asia. Traditions are still alive, especially in folk music and dances, including the farandole – an open-chain community dance. Since 1860 a cannon (based at the Château east of Old Nice) is shot at twelve o'clock sharp. The detonation can be heard almost all over the city. This tradition goes back to Sir Thomas Coventry, who intended to remind the citizens of having lunch on time. Cuisine The cuisine of Nice is especially close to those of Provence but also Liguria and Piedmont and uses local ingredients (olive oil, anchovies, fruit and vegetables) but also those from more remote regions, in particular from Northern Europe, because ships which came to pick up olive oil arrived full of food products, such as dried haddock. The local cuisine is rich in around 200 recipes. Most famous include the local tart made with onions and anchovies (or anchovy paste), named "Pissaladière" and derived from the ligurian pissalandrea, a sort of pizza. Socca is a type of pancake made from chickpea flour. Farcis niçois is a dish made from vegetables stuffed with a mixture of breadcrumbs, meat (generally sausage and ground beef), and herbs; and salade niçoise is a tomato salad with baked eggs, tuna or anchovies, olives and often lettuce. Green peppers, vinaigrette, and other raw green vegetables may be included. Potatoes and green beans are not traditional components. Local meat comes from neighbouring valleys, such as the sheep of Sisteron. Local fish, such as mullets, bream, sea urchins, anchovies and poutine/gianchetti are used to a great extent, so much so that it has given birth to a proverb: "fish are born in the sea and die in oil". Examples of Niçois specialties include: Salade niçoise Pan-bagnat Ratatouille Daube Pissaladière Socca Barbajuan Tapenade Fougasse Education Côte d'Azur University Institut Eurécom École des hautes études commerciales du nord École pour l'informatique et les nouvelles technologies Villa Arson ESRA film school Institut supérieur européen de formation par l'action IPAG Business School Supinfo Skema Business School International relations Nice is twinned with: Alicante, Spain Antananarivo, Madagascar Astana, Kazakhstan Can Tho, Vietnam Cartagena, Colombia Cuneo, Italy Edinburgh, UK Gdańsk, Poland Hangzhou, China Houston, United States Kamakura, Japan Laval, Canada Libreville, Gabon Locarno, Switzerland Louisiana