The (SEV or Spanish Society of Vexillology) is a Spain-based non-profit institution devoted to the study of flags.
The institution has signed agreements with various institutions, such as the and the . It regularly collaborates with events organized by entities such as the , the University of Zaragoza and the . The institution also gives free advice to any entities interested in making a flag.
The Spanish Society of Vexillology flag, designed by one of its founding members, José Luis Brugués Alonso, is a square flag that consists of a red, yellow and red cross over white, resembling the Cross of Burgundy Flag made with the Flag of Spain.
The institution was founded on 31 October 1977 and joined the Fédération internationale des associations vexillologiques (FIAV) in 1979. In 1985, the Spanish Society of Vexillology hosted the 11th annual International Congress of Vexillology in a Madrid venue.
The Spanish Society of Vexillology distributes a publication to its members every month, 4 times a year, the magazine Banderas, and 8 times a year, the bulletin Gaceta de banderas.
Since 1986, the Society has held a national congress of vexillology in Spain every year.
In addition to Banderas and Gaceta de banderas, the institution has also published several books