The patroness of Triora is Our Lady of the Assumption, celebrated on 15 August. The parish-collegiate church dedicated to her, in the historic centre, has ancient origins: between 1770 and 1775 the original interior layout was replaced with a single nave, and in 1837 the façade was converted to Neoclassical style. It holds a painting by Taddeo di Bartolo, signed and dated 1397, the oldest painting in the province of Imperia. Nearby stands the new oratory of San Giovanni Battista, from 1677, which holds a 1725 wooden statue of the saint attributed to Anton Maria Maragliano, as well as paintings by Luca Cambiaso and the local painters Battista and Lorenzo Gastaldi, and a precious 15th-16th-century panel depicting Saint Nicholas of Tolentino.
After a period of peace between the 15th and 16th centuries, during which churches and other works of art were built, Triora's local history is marked above all by the famous witchcraft trials carried out between 1587 and 1589, when several local women were accused of causing the famine then afflicting the municipal territory; in memory of these events the Strigora was established, a festival dedicated to witchcraft held on the first Sunday after Ferragosto through the streets of the old town, dominated by Triora Castle, the Castrum vetus Trioriae, built between the 12th and 13th centuries. In the 20th century, on 2 and 3 July 1944, the town was set ablaze by Nazi fury.
