first panopticon that was excavated and uncovered is located to the north of A Division and remains relatively intact. The excavation and uncovering of the other two panopticons next to B Division only revealed the remains of its rubble footings. Jika Jika high-security unit (K Division) Jika Jika, opened in 1980 at a cost of A$7 million, was a 'gaol within a gaol' maximum-security section, designed to house Victoria's hardest and longest-serving prisoners. It was awarded the 'Excellence in Concrete Award' by the Concrete Institute of Australia before being closed, eight years later, amidst controversy after the deaths of five prisoners in 1987. The design of Jika Jika was based on the idea of six separate units at the end of radiating spines. The unit comprised electronic doors, closed-circuit TV and remote locking, designed to keep staff costs to a minimum and security to a maximum. The furnishings were sparse and prisoners exercised in aviary-like escape-proof yards. In 1983 four prisoners escaped from 'escape-proof' Jika Jika. When two prison officers were disciplined in relation to the Jika Jika escape, a week-long strike occurred. 1987 Jika Jika prison fire Inmates Robert Wright, Jimmy Loughnan, Arthur Gallagher, David McGauley and Ricky Morris from one side of the unit, and convicted Russell Street bomber Craig Minogue and three other inmates on the other side, sealed off their section doors with a tennis net. Mattresses and other bedding were then stacked against the doors and set on fire. Wright, Loughnan, Gallagher, McGauley and Morris died in the blaze, while Minogue and the three others were evacuated and survived. Prison works In 1851, an ad hoc group of structures built by prison labour using local materials existed. None of these structures survived, other than the boundaries of the prison that were established. The second phase of construction, undertaken in the late 1850s and early 1860s, was the construction of Inspector General William Champ's model prison complex, based on British and American precedents. In 1924, Pentridge replaced the Melbourne Gaol as the main remand and reception prison for the metropolitan area. In 1929, Melbourne Gaol was closed and its prisoners relocated to Pentridge. The Victorian Government confirmed its intention to close Pentridge and replace it with two new male prisons, each accommodating around 600 prisoners, in December 1993. In April 1995, the Office of Corrections ordered that the six main towers at Pentridge be closed, since