The loan is to acquire the Gran Vía 18 building, which will become the new flagship store of the marketplace owned by Dimas Gimeno, former president of El Corte Inglés.
Nabiax has two data centres in Spain, Brazil, Peru and Argentina, and one each in the US, Mexico and Chile.
The 20,000 square metre site is located in the Madrid city of Alcobendas. Of the total, 6,000 square metres will be used for the data centre.
The 10,000 assets that comprise it are half land and half residential and commercial, primarily in Andalusia and the Basque Country.