The San Fermín festival is an ancient celebration held annually from 6 July to 14 July in the city of Pamplona in northern Spain. While the most important activity in this celebration is encierro, the running of the bulls, the festival also includes many other traditional activities throughout the week. Known in the local language as Sanfermines, this festival is held in honor of San Fermin, the guardian angel of Pamplona and Navarre as a whole. What happened at the festival is at the center of American author Ernest Hemingway's work The Sun Also Rises. The San Fermin Festival is probably the most recognized internationally among the festivals held in Spain.