A Poplar family is grieving the loss of irreplaceable Native artwork after a fire destroyed the Our Lady of Lourdes Parish, and with it, paintings by renowned Native artist Roscoe White Eagle.For David Grainger and his son Gavyn Grainger, the church was more than a place of worship. It was home."I grew up in there. That was a big, big thing in my family. Going to church every Sunday," Gavyn said. The fire took more than the building. It destroye…