some of Martha Stewart's cookware was manufactured by Meyer Corporation, a cookware and kitchenware company based in California, USA. However, specific product lines and manufacturing locations can change over time, so it's essential to check the packaging or official website for the most up-to-date information.
When looking for information about the origin of a specific product or cookware line, check the label or packaging, as it usually indicates the country of origin or manufacturing location. Additionally, you can visit the official website of Martha Stewart or the brand responsible for manufacturing her cookware to find detailed information about their products and manufacturing processes.