Keywords: Monogram of Catherine the Great.jpg Monogram_of_Catherine II The_Great Silver gold cut diamonds; polished http //www hermitagemuseum org/html_En/05/hm5_4_1_5_3_0_big html s 1770 -1780s Author PD-old-100 E in heraldry Jewellery in the Hermitage Museum Catherine II's items Brooches Catherine's II of Russia imperial monogram Signs of Russian Empresses 1770s jewellery |