IPSWICH Grammar School launched its 150th year in style with a packed assembly on Monday morning.
The program incorporated the school leaders' induction and tributes to former headmasters and captains.
Distinguished Old Boys came back to IGS for the occasion, including Queensland "great" and former Liberal Party leader Sir Llew Edwards.
IGS, Queensland's first secondary school, plans special events in 2013, including the launch of a commemorative book on March 15.
Headmaster Robert Henderson said IGS had left its mark on Australia and the rest of the world, with more than 14,000 students passing through the school in the past 150 years.
"It was a real honour and privilege to welcome back the likes of Old Boy Sir Llew Edwards, past headmaster Denis Frederiksen, 30 former school captains and 40 members of the class of 1963," he said.
"Our 150 assembly was a tremendous opportunity to acknowledge the history and tradition of Ipswich Grammar School."
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