About 170 crosses made from ice-block sticks will be erected in the top part of the Octagon to represent the 170 deaths and disappearances of Peace Community members around the world.
The Peace Community is one of the causes Amnesty International has decided to support during Freedom Week (August 1-7) this year.
Pupils from four Dunedin secondary schools have established what is believed to be the first inter-school Amnesty International group in New Zealand, to carry out the activity.
Logan Park High School head girl Eve Kennedy said the group consisted of pupils from Kaikorai Valley College, Logan Park, Otago Girls' and Otago Boys' High Schools, and it was hoped each school in Dunedin would eventually have representatives in the group.
Eve said the group would turn the Octagon into a temporary graveyard on Saturday from 1pm to 4pm, and create a mini "peace community".
"The community will be surrounded by militarily-dressed figures wearing arm bands.
"This is to represent the plight of the Peace Community of San Jose de Apartado, a community in Colombia which refuses to arm themselves and get involved with the combat and civil strife ... in Colombia at the moment.
"I think that this event demonstrates the desire for positive change and global awareness of our youth today."
Other Amnesty International events during the week include yesterday's theatre performance by the Otago University Amnesty Group at The Link; a showing of the film The Stoning of Soraya M in the Colquhuon Lecture Theatre at Dunedin Hospital (today 5.45pm-8pm) and a street appeal tomorrow.
