includes the Central Saint Martins College of Art and Design and Chelsea College of Art and Design; Goldsmiths, University of London; the Slade School of Fine Art (part of University College London); the Glasgow School of Art; the Royal College of Art; and The Ruskin School of Drawing and Fine Art (part of the University of Oxford). The Courtauld Institute of Art is a leading centre for the teaching of the history of art. Important art galleries in the United Kingdom include the National Gallery, National Portrait Gallery, Tate Britain and Tate Modern (the most-visited modern art gallery in the world, with around 4.7 million visitors per year). Cinema The United Kingdom has had a considerable influence on the history of the cinema. The British directors Alfred Hitchcock, whose film Vertigo is considered by some critics as the best film of all time, and David Lean are among the most critically acclaimed of all time. Many British actors have achieved international fame and critical success. Some of the most commercially successful films of all time have been produced in the United Kingdom, including two of the highest-grossing film franchises (Harry Potter and James Bond). Ealing Studios has a claim to being the oldest continuously working film studio in the world. In 2009, British films grossed around $2 billion worldwide and achieved a market share of around 7 per cent globally and 17 per cent in the United Kingdom. UK box-office takings totalled £944 million in 2009, with around 173 million admissions. The annual British Academy Film Awards are hosted by the British Academy of Film and Television Arts. Cuisine British cuisine developed from various influences reflective of its land, settlements, arrivals of new settlers and immigrants, trade and colonialism. Celtic agriculture and animal breeding produced a wide variety of foodstuffs for indigenous Celts and Britons. Anglo-Saxon England developed meat and savoury herb stewing techniques before the practice became common in Europe. The Norman conquest introduced exotic spices into England in the Middle Ages. The British Empire facilitated a knowledge of Indian cuisine with its "strong, penetrating spices and herbs". British cuisine has absorbed the cultural influence of those who have settled in Britain, producing hybrid dishes, such as chicken tikka masala. Vegan and vegetarian diets have increased in Britain in recent years. In 2021, a survey found that 8% of British respondents eat a plant-based diet and 36% of respondents