The Palacio de la Aduana (Customs Palace) in Málaga is a neoclassical masterpiece that stands as a testament to the city’s rich architectural heritage. Commissioned in 1787 by Manuel Martín Rodríguez and approved by King Charles III, construction began in 1791 and was completed in 1829. Its design, inspired by Italian Renaissance palaces, features four wings surrounding a central courtyard adorned with porticoes and Roman busts, creating a harmonious balance between form and function. Throughout its history, the Palacio de la Aduana has served various purposes, including as a customs house, the Royal Tobacco Factory, and government offices. In 2016, after extensive renovations, it reopened as the Museo de Málaga, housing both the Archaeological and Fine Arts collections.

The Palacio de la Aduana in Malaga was used to represent the headquarters of the fictional Vatican of the Order of the Cruciform Sword (OCS) in ‘Warrior Nun’. In the plot, this building houses the corridors and offices where the warrior nuns receive training and orders. The interiors of the palace, with its long corridors and arches, were transformed to simulate Vatican facilities.