The Polo Symbols: Forum of the Ox

The Polo Symbols: Forum of the Ox was a virtual representation of one of Ezio Auditore da Firenze's genetic memories, relived by Desmond Miles in 2012 through the Animus.

Description
Climbing to the top of the column with an adjacent viewpoint in the Forum of the Ox, Ezio scanned a Polo symbol between two columns to the east of his position.

Outcome
Ezio located and unearthed the book titled Nibelungenlied.

Reference

 * Assassin's Creed: Revelations