Made in France since 1850. Made of all natural materials. High-fired Burgundy clay using Emile Henry ceramic. Superior heat retention. Burgundy clay has superior even-heat diffusion and heat retention properties; it keeps food hot on the table longer. Resistant against temperature change. For use in the oven up to 520 degrees F. Oven broiler and microwave safe: can go directly from freezer or refrigerator to a hot oven to table. Durable and scratch resistant.