sentences:  The Art Treasures of Great Britain was an exhibition of fine art held in Manchester from 5 May to 17 October 1857.It remains the largest art exhibition to be held in the UK, possibly in the world, with over 16,000 works on display.It attracted over 1.3 million visitors in the 142 days it was open, about four times the population of Manchester at that time, with many visiting on organised railway excursions.