Olives Noires de la Vallée des Baux de Provence (full name) is a style of olives made in Provence from olives from Grossane trees (which grow in the same area, Vallée des Baux de Provence.) The style of processing the olives is AOC protected.The olives are harvested in December when the olives are changing from purple to black, then cured for 10 months.
There are many different makers in the AOC consortium, so the final treatment after that can vary, but the olives are generally flavoured with herbs such as thyme and rosemary.