The center focuses on an exchange of keys between two men, Justin of Nassau and the opposing general, Ambrogio Spinola.   
The central scene in this painting relied heavily on an emblem in Andrea Alciati's Liber Eblemata, a popular book of the time, according to Jonathan Brown, an expert on the artist.  Brown also recently confirmed the attribution of the artist's Portrait of a Man, featuring a man who reappears at the far right of this canvas. It remains the most famous of 12 scenes painted for the Hall of Realms in a new state palace at the time.  Two clusters of figures dominate the space, and among those on the left we see the head of a horse peeking out over the shoulder of a man in bright white, which is contrasted with the hind quarters of the same horse standing out on the right. The center focuses on an exchange of keys between two men, Justin of Nassau and the opposing general, Ambrogio Spinola.   For 10 points, name this painting depicting the 1625 Dutch capitulation at the titular fortress, a work by Diego Velazquez.
The central scene in this painting relied heavily on an emblem in Andrea Alciati's Liber Eblemata, a popular book of the time, according to Jonathan Brown, an expert on the artist.  
Surrender of Breda (or Surrender at Breda or The Lances or Las Lanzas)