Santa Marta was initially built in the late 15th-century but rebuilt at the end of the 16th century by the Confraternity of Santa Marta, a confraternity of disciplinanti (or flagellants). To the right of the entrance, they built an oratory.
Of the original decoration only one altar remains, and traces of frescoes in the presbytery and some lunettes in the walls of the oratory. Deconsecrated after World War Two, it became the property of the Commune of Ivrea in the 1970s, who converted it into a conference hall. The Baroque portal was moved to the parish church of San Bernardino in Ivrea.
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The first written record of church in Danmark locality date back to the year 1291. Close to the church are several stones with a Christian text and cross inscribed. The oldest parts of the present red-brick church are from the 1300s. In the late 1400s the church was enlarged to the appearance it has today. The church has been modified both internally and externally several times, among other things after the fires in 1699 and 1889. There are lot of well-preserved mural paintings in the walls.