2021 Pantheon Sancta Maria Ad Martyres 100 g Silver Coin SKU:CPC9188. Measures 55 mm in diameter, features an Antique Finish, and contains 100 grams 0.999 Silver. Comes with the original government packaging, including a certificate of authenticity. Limited mintage of 999. The images you see are for the exact item you will receive. Pantheon: Sancta Maria Ad Martyres.