For 10 points, name this iconic painting by Diego Velázquez.
In the background of this work, two paintings by Peter Paul Rubens are depicted hanging on a wall. A mirror in the back of this painting features a double portrait of Mariana of Austria and this work's patron, Philip IV. The artist of this work depicted himself at work on its left side, holding a paintbrush and palette. On the right side of this work, a dwarf rests his foot on a dog. In its foreground, the Infanta Margarita of Spain is tended to by two attendants. For 10 points, name this iconic painting by Diego Velázquez.
In the background of this work, two paintings by Peter Paul Rubens are depicted hanging on a wall.
Las Meninas [or The Maids of Honor; or The Ladies in Waiting]