Like the Fountain of the Galápagos, the well-known Fountain of the Castellana (also referred to as Fountain of the Castellana Obelisk, Fountain of Isabel II or Fountain of the Arganzuela Park) was commissioned by Ferdinand VII to celebrate the birth of his daughter, the future Isabella II.
The Madrid City Council gave orders for work to begin on 10 October 1833, but the death of Ferdinand VII eleven days earlier nearly led to the suspension of the project. Queen María Cristina wanted work to begin immediately and ordered arrangements for the inauguration to proceed. Together with the foundation stone, a glass urn was laid down containing certain mementoes: the names of the councillors and various coins from 1833 (five pesetas, one peseta, a gold doubloon, a silver real, one and two cuartos and an ochavo).
After a series of moves, the monument was finally placed in Arganzuela Park. The granite base is in the form of a pedestal and consists of two parts. The obelisk stands on the second section and is crowned by a pole star in bronze.