Pope Francis issued a historic apology Monday for the Catholic Church's cooperation with Canada's 'catastrophic' policy of Indigenous residential schools, saying the forced assimilation of Native peoples into Christian society destroyed their cultures, severed families and marginalized generations in ways still being felt today.

Iran PressAmerica: "I am sorry", Francis said, to applause from school survivors and Indigenous community members gathered at a former residential school south of Edmonton, Alberta, the first event of Francis' weeklong 'penitential pilgrimage' to Canada.

The morning after he arrived in the country, Francis traveled to the lands of four Cree nations to pray at a cemetery. Four chiefs then escorted the pontiff in his wheelchair to powwow ceremonial grounds where he delivered the long-sought apology and was given a feathered headdress.

"I humbly beg forgiveness for the evil committed by so many Christians against the Indigenous peoples," Francis said near the site of the former Ermineskin Indian Residential School, now largely torn down.

More than 150,000 native children in Canada were forced to attend state-funded Christian schools from the 19th century until the 1970s in an effort to isolate them from the influence of their homes and culture. The aim was to Christianize and assimilate them into mainstream society, which previous Canadian governments considered superior.

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The Canadian government has admitted that physical and sexual abuse was rampant at the schools, with students beaten for speaking their native languages. That legacy of that abuse and isolation from family has been cited by Indigenous leaders as a root cause of the epidemic rates of alcohol and drug addiction now on Canadian reservations.

The discoveries of hundreds of potential burial sites at former schools in the past year drew international attention to the legacy of the schools in Canada and their counterparts in the United States. The discoveries prompted Francis to comply with the truth commission's call for him to apologize on Canadian soil for the Catholic Church's role; Catholic religious orders operated 66 of the 139 schools in Canada.

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