The Royal Agricultural Hall (now the Business Design Centre) is a Grade II listed building, which opened in 1862 in the district of Islington in London, England, for holding agricultural shows. It was the home of the Royal Smithfield Club's Smithfield Show from 1862 to 1938. It hosted the Royal Tournament from its inauguration in 1880 until the event became too large for the venue and moved to Olympia in the early years of the 20th century. It hosted the first Crufts dog show in 1891. During the Second World War, the hall was commandeered by the Government, and from 1943, following the destruction of Mount Pleasant sorting office in an air raid, the Parcels Depot was moved to the hall. The hall then remained unused and empty until it was converted to its present use as the Business Design Centre in 1986.
According to the official Islington Libraries compilation, the Royal Agricultural Hall had its origins when in 1798 the Duke of Bedford, Sir Joseph Banks and other nobles and gentlemen decided to form the Smithfield Club which would hold annual exhibitions of livestock, agricultural produce and agricultural implements. Following some 40 years of exhibiting, first in Smithfield at Wooton’s Livery Stables near Smithfield Meat Market then at a site in the Barbican, it moved in 1839 to premises in Baker Street. However it outgrew these and it was then proposed that the club erect a hall large enough to accommodate their annual display and also to be available for other shows. The foundation stone was laid in 1861 – although a large part of the building had already been completed, and held its first exhibition in 1862.
When built it was one of the largest exhibition halls in the world. It was this building that was the original basis of the present hall, which has expanded on this site since the foundation stone was laid (though most of the building had already been completed) in 1861. The main exhibition hall covers 65,000 square feet (6,000 m2).