Britain, employing a workforce of over 20,000, and by 1929 it was the dominant steel producer on Teesside after taking over Bolckow, Vaughan & Co and acquiring its assets. It was possibly the largest steel producer in Britain at the time. The steel components of the Sydney Harbour Bridge (1932) were engineered and fabricated by Dorman Long of Middlesbrough. The company was also responsible for the New Tyne Bridge in Newcastle. Several large shipyards also lined the Tees, including the Sir Raylton Dixon & Company, which produced hundreds of steam freighters including the infamous SS Mont-Blanc, the steamship which caused the 1917 Halifax Explosion in Canada. The area is still home to the nearby large Wilton International industrial site which until 1995 was largely owned by Imperial Chemical Industries (ICI). The fragmentation of that company led to smaller manufacturing units being owned by multinational organisations. The last part of ICI itself completely left the area in 2006 and the remaining companies are now members of the Northeast of England Process Industry Cluster (NEPIC). Culture Festivals and fairs The Middlesbrough Mela is an annual, multi-cultural festival attracting an audience of up to 40,000 to enjoy a mix of live music, food, craft and fashion stalls. It began in Middlesbrough's Central Gardens, now Centre Square, and is either held there or in Albert Park. Theatres and music venues Middlesbrough also has a healthy musical heritage. A number of bands and musicians hail from the area, including Paul Rodgers, Chris Rea, and Micky Moody. Middlesbrough Town Hall is the pre-eminent theatre venue in Middlesbrough. It has two concert halls: the first is a classic Victorian concert hall with a proscenium stage and seating 1,190; the second, under the main hall, is called the Middlesbrough Crypt and has a capacity of up to 600. The venue is run by Middlesbrough Council and is funded, in part, by Arts Council England as a National Portfolio Organisation specialising in music. It was refurbished with the assistance of the National Lottery Heritage Fund and reopened in 2018. The Middlesbrough Theatre (formerly the Little Theatre) is in the suburb of Linthorpe. It was designed by architects Elder & De Pierro and was the first purpose designed theatre to be erected in post-war England when it was opened on 22 October 1957 by Sir John Gielgud. Art and galleries The town has three art galleries. Middlesbrough Institute of Modern