Barbie Renaissance Princesses (2008)

It’s a masquerade ball for Barbie and friends, a magical night she hopes never ends.
A playline series of Barbie as princesses released in 2008.
Each doll comes dressed in renaissance-style princess gown, along with a mask and other accessories for a masquerade ball.
Kelly dolls were also released wearing matching outfits.
Six dolls, including three Barbies and three Kelly dolls, were released in this series.

Similar masquerade princess lines that were also released:
Carnivale Ball (2005) & Masquerade Ball (2006)