Montferri Main Festival Activity · Montferri, Alt Camp, Tarragona Image of Montferri, not of the place itself. The fiesta mayor of Montferri is celebrated in the town where the architect Josep Maria Jujol designed, in 1926, a sanctuary of parabolic arches in exposed brick that was left unfinished due to the war and lack of funds; work resumed decades later and the building was completed and consecrated in 1999. Photo: Tabalot (Public domain) What to see and do in Montferri