The skulls were excavated at an old Sami burial ground in Lycksele in the 1950s - a time when racial biology was practiced in Sweden. The skulls were taken to the National History Museum in Stockholm for research.
It's been 12 years since the Sami parliament in Kiruna demanded that all Sami remains held in museums should be returned to their place of origin. And despite Friday afternoon's ceremony, Mikael Jakobsson, chair of the Sami Parliament's ethical council, says repatriation is taking too long, with Sami remains still in place at 11 state-owned museums.
"The work has been very slow," he tells Swedish Radio.