Rogue Valley Roses lists Charles Lefebvre (Lacharme) as Zone 5.

Survived the winter of 2013, basically a zone 4a winter

Fantastic rose, I need to hurry out there to take a photo of it. It's arching branches are covered with blooms of a purple-red in my acid soil. It is in light shade, and does get some blackspot on the lower leaves, but regrows them. The plant has very few leaves.