Princess Royal At Royal Show -- H.R.H The Princess Royal, who was a visitor to the Royal show at Windsor Great Park, seen watching with interest a demonstration in the Forestry sections during her tour of the exhibition, today. The Royal Agricultural Show, an annual event Organised by the Royal Agricultural Society of England, which is one of the largest exhibitions of it's kind in the world, opened today at Windsor Great Park, where it is being held this year at the invitation of H.M. The Queen, president of the Show. July 08, 1954. (Photo by Fox Photos).