The temporary exhibition will open on July 22, the anniversary of the attacks, in a government office complex outside of which Breivik began his killing spree by detonating a car bomb, killing eight people.
He later opened fire on a Labour Party youth camp on the island of Utoya, taking 69 lives, most of them teenagers.
The fake ID and police uniform he used to enter the youth camp, the bag he used to carry ammunition and parts of the car are among the items to be displayed.
"It will be a centre for learning," Sanner said.
But a lawyer representing Breivik's victims, John Christian Elden, slammed the project.
"A Breivik museum in the government complex? No thank you. Send the goods to the National Museum of Justice in Trondheim instead," he wrote on Twitter.
Others feared the exhibition could attract the wrong type of crowd.
"Has anyone considered the risk of this 'information centre' becoming an altar for right-wing extremists?" said Anders Danielsen Skyrud, a communications worker for Norway's Green Party.
A memorial for Breivik's victims will also be inaugurated on July 22 on Utoya, 30 km (19 miles) northwest of Oslo.
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He later opened fire on a Labour Party youth camp on the island of Utoya, taking 69 lives, most of them teenagers.
The fake ID and police uniform he used to enter the youth camp, the bag he used to carry ammunition and parts of the car are among the items to be displayed.
"It will be a centre for learning," Sanner said.
But a lawyer representing Breivik's victims, John Christian Elden, slammed the project.
"A Breivik museum in the government complex? No thank you. Send the goods to the National Museum of Justice in Trondheim instead," he wrote on Twitter.
Others feared the exhibition could attract the wrong type of crowd.
"Has anyone considered the risk of this 'information centre' becoming an altar for right-wing extremists?" said Anders Danielsen Skyrud, a communications worker for Norway's Green Party.
A memorial for Breivik's victims will also be inaugurated on July 22 on Utoya, 30 km (19 miles) northwest of Oslo.
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