| Gas Natural Building | |
| Native Name: | Edificio Gas Natural |
| Native Name Lang: | es |
| Start Date: | 2003 |
| Completion Date: | 2005 |
| Building Type: | office skyscraper |
| Location: | Barcelona, Catalonia, Spain |
| Height: | 860NaN0 |
| Floor Count: | 20 |
| Architect: | Enric Miralles & Benedetta Tagliabue |
| Style: | High-tech |
| Owner: | Inmobiliaria Colonial |
The Gas Natural Building, also known as Mare Nostrum Tower, is an office skyscraper located in the La Barceloneta neighbourhood of the Ciutat Vella district in Barcelona, Spain.
It was the headquarters building of the Spanish company Naturgy, formerly known as Gas Natural, until 2019 when the company's legal headquarters were moved to Madrid.
The Gas Natural Building was designed by the architects Enric Miralles and Benedetta Tagliabue in the high-tech architectural style. It was completed in 2005 and officially inaugurated in 2008.
It has 20 floors, and rises 860NaN0.[1] It has an innovative and distinctive image, as the building has two lower horizontal glazed blocks protruding and cantilevered out from the main tower.
It is located near the seafront, and to the southwest of two other La Barceloneta skyscrapers, the Hotel Arts and the Torre Mapfre.
In 2019, Naturgy sold the Mare Nostrum Tower to Inmobiliaria Colonial.[2]