Cattle Pavilion in 1950, the work being carried out by MR Hornibrook Builders at a cost of , and the addition of seating around the main oval near Machinery Hill. Also constructed in the 1950s was a new Dairy Industry Hall, adjacent to the John Reid Pavilion, on the site of the 1933 dairy hall. By the late 1950s, the grounds comprised approximately . The Brisbane Exhibition Ground was also the site chosen for the people of Brisbane to welcome Queen Elizabeth II and her husband, Prince Philip, the Duke of Edinburgh, when they visited Australia during March 1954. It was Queen Elizabeth's first visit to Australia as Queen of Australia and 30,000 people attended the 40-minute welcome ceremony at the Exhibition Ground. A number of new buildings were erected in the 1960s. In 1962, the RNA moved its offices from the Queensland Primary Producers Association building in Adelaide Street to the Exhibition Grounds and in 1970 a purpose-built RNA Administration Building costing $111,584 was opened. In 1963, on land acquired along Constance Street, a double pavilion known as the Agricultural Hall and Douglas Wadley Pavilion was constructed. The Agricultural Hall housed district and junior farmer exhibits. The Douglas Wadley Pavilion, extended in 1968 and again in 1977, housed dogs, and is used regularly for exhibitions in addition to the annual August show. In 1968 the Ring Control and Broadcast building was enlarged. By 1970, the grounds comprised approximately . The first animal nursery was established by RNA councillor Frank Robertson at the 1964 show. The baby animals have proved one of the most popular and enduring of the show traditions and has been copied by show societies throughout Australia. At the 1972 Exhibition a purpose-built facility for the animal nursery was opened, named in honour of Mr Robertson. In the late 1960s, the face of Sideshow Alley, traditionally home to the weird and wonderful, began to change. The tents and booths largely disappeared, to be replaced with high technology rides, tests of skill and popular music entertainment. Controversy was generated when the Queensland Government declared a state of emergency from 13 July to 2 August, during the 1971 South African Springbok Rugby team tour, when demonstrations against apartheid were held in Brisbane and throughout Australia. The main show ring at the Exhibition Ground was commandeered to host the matches, as a safe distance could be maintained between spectators and