In the documents stored in the Episcopal Curia of Casale Monferrato turns out that a first church of Saint Peter to the Castle goes back to 1183. The Parish was instituted in 1701 and had as first priest the priore Giovanni Battista Broglia who rebuilt the Church in 1722.

About the Church of Saint Peter to the Castle it is reported the aside inventories of ecclesiastical assets have been carried out in 1563, 1612, 1630, 1688, 1701, etc etc.

The first known pastoral visit is the one made by the Bishop of Novara Girolamo Ragazzoni in 1577. The last pastoral visit, before the destruction of the above mentioned church, goes back to Avogadro Bishop in 1766.

The church of Saint Peter to the Castle was destroyed in the years following the French revolution. In fact Monsignor Alciati - inaugurating the new parochial church built in the present site in the years 1805-1808 along with the widening of the pre-existing oratory of the SS Trinità – made a note of the fact that the bell tower was still uncompleted and hinted “to the old parochial destroyed on the high of the hill” beside which there was the cemetery still in function although the prohibition.

The present Church, placed in a so wonderful panoramic area and so rich of historical memories, was rebuilt in 1887.