Castell d'Òdena stands on a hilltop in the Anoia region of Catalonia, distinguished by its rare octagonal tower that dates back to the 10th century. First documented in 957 AD, this fortress served as a significant stronghold under the County of Barcelona until the 13th century. The castle features a unique exterior architecture with an eleven-sided polygonal form that creates a truncated pyramid silhouette, housing a circular interior. Though heavily damaged during the 1463 Catalan Civil War and now existing primarily as ruins, the site remains municipally protected and offers insights into early medieval Catalan military architecture and defensive strategies.
