The author analyzes the factional strifes between the two most prominent noble houses of the city of ?vila that took place at the end of the fifteenth and at the beginning of the sixteenth century. He tries to verify if there was any kind of connexion between these strifes and the affiliation of the families of the local oligarchy of the city to two local institutions that were called the linajes (lineages) of Saint Vicent and Saint John that guaranteed the peaceful distribution of the offices of local government in the city. He arrives to the conclusion that at the analyzed period these linajes were not genuine factions with a hierarchical structure, because divisions between groups of aldermen that rivalled for power had developed within them.

El autor analiza las luchas banderizas entre las dos principales casas nobles de la ciudad de ?vila a fines del siglo xv y comienzos del siglo xvi. Trata de determinar si hubo conexiones entre estas luchas y la pertenencia de las familias que constitu?an el grupo olig?rquico abulense a dos instituciones llamadas los linajes de San Vicente y San Juan, que serv?an para garantizar el pac?fico reparto de los oficios de gobierno local. Y llega a la conclusi?n de que en la ?poca analizada dichos linajes ya no constitu?an aut?nticas facciones, estructuradas de forma jer?rquica, porque en su seno se hab?an desarrollado divisiones entre grupos de regidores que se disputaban entre s? el poder.