The Spanish Bank is an AA corporation based out of Madrid. Though its history goes way back as the central Spanish bank from before the 21st Century, its actual form is a product of the strong merges that happened after the Crash, when the Spanish banks realized that they had to join in order to remain competitive.
Nowadays, the Spanish Bank is the central entity of Spanish economy, and many international investors have joined in too. Even so, its internal politics are messy at best, due to the fact that the old CEO's of the different banks that merged now all sit together, and not all of them are happy working with each other. Besides, the colliding interests of too many of its investors (especially Sol Media and Meridional Agronomics) tend to push the bank down roads it would rather not go.
A large part of the bank is owned by the Vatican Bank.