Restoration of "Victorian biscuit tin" painting reveals 1570s masterpiece depicting Isabella de Medici

Restoring a portrait held by the Carnegie Museum of Art revealed the true appearance of its subject, Isabella de' Medici. The painting was touched up in the 1800s with "Victorian biscuit tin features" to make her more conventionally attractive to potential buyers. Previously thought to be a 19th-century confection, the masterpiece is now attributed to t…