It was 150 years ago when First Nations chiefs and dignitaries met at Fort Carlton, in the wilderness of what is now Saskatchewan, to carve out a lasting agreement on how to work and live as the modern shape of Canada emerged.

Politicians, dignitaries, Indigenous chiefs and elders are set to gather in the same place on Sunday to honour Treaty 6, celebrate its legacy and recommit to fixing promises broken and dreams unrealized.

“Events surrounding this major milestone provide a special opportunity to recognize the resilience and vibrancy of Treaty 6 Nations,” federal Crown-Indigenous Relations Minister Rebecca Alty said in a statement.