Five Muslim men could serve life sentences in Australia.
A jury has convicted them of plotting the country's largest terrorist conspiracy.
The men were stockpiling bomb-making instructions, and buying explosive chemicals and guns.
Their goal was to force Australia's government to change its policy on Middle East conflicts.
The raids also turned up militant Islamic material, including footage of planes flying into the World Trade Center on September 11.
A sentencing hearing is set for December 14.