HM Prison Pentridge was an Australian prison that was first established in 1851 in Coburg, Victoria. The first prisoners arrived in 1851. The prison officially closed on 1 May 1997. Pentridge was often referred to as the "Bluestone College", "Coburg College" or "College of Knowledge". The grounds were originally landscaped by landscape gardener Hugh Linaker. The site is currently split into two parts. The northern part of the prison, referred to as the "Pentridge Coburg" or "Pentridge Piazza" site, is bordered by Champ Street, Pentridge Boulevard, Murray Road and Stockade Avenue. It is currently under development by the developer Shayher Group, who has owned the site since 2013. The southern part of the prison, referred to as the "Pentridge Village" site, is bordered by Pentridge Boulevard, Stockade Avenue, Wardens Walk and Urquhart Street. It is partially owned by the developer Future Estate. D Division is owned privately by Pentridge Cellars Pty Ltd. Divisions The prison was split into many divisions, named using letters of the alphabet. A – Short- and long-term prisoners of good behaviour but during the late 1980s till its closure it became a scene of many monthly bashings, stabbings and bludgeonings. B – Long-term prisoners with behaviour problems C – Vagabonds and short-term prisoners, where infamous bushranger Ned Kelly was imprisoned (demolished early 1970s) D – Remand prisoners E – The hospital, later turned into a dormitory division housing short-term prisoners F – Remand and short-term G – Psychiatric problems H – High security, discipline and protection J – Young Offenders Group. Later for long-term prisoners with record of good behaviour Jika Jika – maximum-security risk and for protection, later renamed K Division Panopticons In 2014, archaeological work in the former prison grounds led to the discovery of three rare panopticons (named after Jeremy Bentham's prison design of 1791) located near the A and B Divisions that were built of bluestone in the 1850s. The first uncovered and excavated was to the north of A division. The circular design, with walls coming out from the centre, created wedge shaped 'airing yards' where prisoners would be permitted access for one hour per day without coming into contact with each other. The panopticons fell out of use, due to prison overcrowding, and were largely demolished in the early 1900s. The panopticons were based on the design concepts of British philosopher and social reformer Jeremy Bentham. The footings of the