Focus on this artwork and explain the History.
At the beginning of the 17th century, Rubens was a court painter in Mantua. During this time (and later in other places) he copied Italian painters, including Titian. These are considered close copies. The date of the Rubens copy remains unclear (1600, c. 1605 or later), and so does the date of Titian's original (depending on the source, the years 1524-1536 are assumed). After Rubens' death, two copies from his hand of two Titian portraits depicting Isabella d'Este are mentioned in his inventory. The Rubens painting Isabella in Red later transferred from the collection of Archduke Leopold Wilhelm of Austria to the Kunsthistorisches Museum.
Independently, since chronologically before, other copies of the lost Titian original exist, in particular:A copy from Titian's workshop (very similar but with a more youthful representation of the subject) is documented by a photograph (provenances Léopold Goldschmidt and Contesse Vogué in Paris)
An anonymous 16th-century copy (breastpiece representing the same age) shows the inscription "Isabella Estensis" and is now in the Walker Art Gallery in Liverpool.
Kunsthistorisches Museum Rubens Titian Liverpool Walker Art Gallery Isabella d'Este Mantua Archduke Leopold Wilhelm of Austria