Fort Denison, part of the Sydney Harbour National Park, is a protected national park that is a heritage-listed former penal site and defensive facility occupying a small island located north-east of the Royal Botanic Garden and approximately east of the Opera House in Sydney Harbour, New South Wales, Australia. The island is also known as Mattewanye or Muddawahnyuh in the Eora language, and as Pinchgut Island. The site contains time gun, navigational aids and tide gauge facilities. Correctional and military facilities were designed by George Barney and built from 1840 to 1862 by William Randle. The property is owned by the Office of Environment & Heritage, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 2 April 1999. In 1978 the former fortress was listed on the (now defunct) Register of the National Estate, and is currently used as a national park, nature reserve, tourist facility, and as a function space. History Prior to European settlement, the island had the Eora name Mattewanye (sometimes Mallee’wonya). Prison After the First Fleet arrived in 1788, Governor Phillip and his advocate-general used the name "Rock Island". In 1788, a convict named Thomas Hill was sentenced to a week on bread and water in irons there. The island came to be known as "Pinchgut". Once a high or higher sandstone islet, the rock was levelled by convicts under the command of Captain George Barney, the civil engineer for the colony, who quarried it for sandstone to construct nearby Circular Quay. In late 1796 the Governor had installed a gibbet on Pinchgut. A convict to be hanged and then gibbeted there was Francis Morgan. In 1793, the British transported him to New South Wales for life as punishment for a murder. The authorities in NSW executed Morgan for bashing Simon Raven to death in Sydney on 18 October 1796. On 30 November 1796, Morgan was hanged; following his execution, his body was hung in chains (gibbeting) on Pinchgut. His skeleton was still hanging there four years after his execution. He said to the hangman that the only thing worth mentioning was the superb view of the harbour from his high elevation, and that he was sure there were no waters the world over to compare with it for beauty. Military fortress In 1839, two American warships entered the harbour at night and circled