Torre del Aire, Salamanca, Medieval fortified tower in central Salamanca, Spain

Torre del Aire is the defensive tower of the Palacio de los Fermoselle, also called Palacio de las Cuatro Torres, built around 1440 on the Plaza de Santa Eulalia in Salamanca. The palace is arranged around an inner courtyard without galleries, and the square, slender tower is made of well-cut ashlar blocks. Its paired windows with flamboyant tracery are unevenly distributed, and the roof over the lookout and the facade facing the plaza were added later.

Built around 1440 for the Castillo family, lords of Santa María del Campo and Fermoselle, the house-tower later passed to the Baron de las Cuatro Torres, who gave the palace its name. In the 18th century it housed a factory making anascotes and bayetas cloth, in 1818 it served as the provisional seat of the Irish college, and it later belonged to the Hijas de María Inmaculada, who ran a female university residence. In July 2024 the building was put up for sale.

The building's name comes from the Baron of the Four Towers, one of its owners. In 1818 it briefly housed the Irish college students, later it belonged to the Hijas de María Inmaculada, who used it as a female university residence. In July 2024 it was put up for sale.

The site sits about five minutes from Plaza Mayor and is easy to reach via Plaza de Santa Eulalia in the central district. Visitors can combine a visit with other nearby historic sites in the area.

The name Palacio de las Cuatro Torres is disputed: historians such as Alfonso Rodríguez G. de Ceballos and Manuel Gómez Moreno link it to the title of the Baron de las Cuatro Torres, while Eleuterio Toribio Andrés and Fernando Araujo hold that three towers were demolished at the end of the 17th century for fear of collapse.