Sevillanas is a type of folk music, sung and written in Seville (Andalusia). Historically, they are a derivative of Castilian folk music, spiced with a bit of Arabic rhythm. Technically, they are a evolution from Castilian seguidillas, they have a relatively limited musical pattern, but rich lyrics, based on country side life, virgins, towns, neighbourhoods, pilgrimage and, of course, love themes. They are sung by a plethora of local groups, like Los Romeros de la Puebla, Los de Gines, Las corraleras de Utrera, Cantores de Hispalis, Los del Rio,... Every year, dozens of new sevillana discs are published.
Sevillanas can be heard in southern Spain, mainly, in fairs and festivals including the famous Seville Fair, La Feria de Sevilla. There is an associated dance for the music: "Baile por sevillanas", consisting in four different parts. One can find schools teaching "baile por sevillanas" in nearly every town in Spain.
Generally speaking, sevillanas are very light and happy music.
Sevillanas are not a part of flamenco, though it may be confused with it.