Olives are native to the Mediterranean region and have been an important part of Mediterranean culture for over 4,000 years. They vary in size, texture, and flavor depending on the type and curing process, which can take 6 weeks to 9 months. Common olive varieties include Cerignola from Italy which are large and mild or black with soft pits; Sicilian green olives that are large and sour; Castelvetrano from Sicily that are bright green and sweet; and Ligurian olives from northern Italy that are small and cured with herbs. The document also provides a recipe for olive bread made with kalamata olives.