Patrick Gerard Small and Mary Elizabeth Small lived in their mansion on the Cullenramer Road at Greystown, near Dungannon.
The couple named their house 'Ard Na Ri', which is Irish for 'king of the hill'.
The mansion also housed a personal 'museum' which contained antique farm equipment.
The house featured a master bedroom with two king-sized beds and showers complete with remote controlled radios.
The couple evaded tax by hiding millions of pounds in offshore bank accounts.
Revenue officials found almost £500,000 in cash at their home in a floor safe.
In the summer of 2007, Mr Small held a public viewing of his home with one visitor calling the event 'bizarre'.
Their 12,000 sq ft mansion was one of several properties they owned, with their portfolio valued at nearly £7m
The garage of the house contained a large games room with a snooker table and gym equipment
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