In the shape of a Latin cross, it is oriented north-south. It is composed of a nave of three bays, relatively high for a small village, a transept and a bedside with one span and three sides. The church was blessed on June 16, 1869. At that time, it could accommodate all the parishioners of the three hamlets of Montceau (750 inhabitants). This church, well located, having for patron saint Sainte-Anne is 26 meters long and 7 meters wide, it originally had a nave, two chapels, a bell tower and a beautiful bell. When one enters the church of Montceau which is very clear, one is struck by the important presence of walnut wood, the wood of the region! These woodwork were not installed during construction in 1869, a tight budget required, but in 1871, according to Father Mermet who wrote: “the woodwork of the choir, the balustrade of the gallery, the credence of the sacristy, the pulpit and the confessional, all these pieces of furniture were designed and executed by Monsieur Tournier, a carpenter in Saint-Jean-de-bournay.” In 1901, 30 years after the construction of the church was completed, polychrome paving replaced the terracotta tiles in the choir and the side chapels.This paving consists of red drawn crosses on a white background. They are placed inside a diamond and in front of a square composed of several ochre, salmon pink and green nets. The window of the Good Shepherd is the only window of the church that is signed. The signature at the bottom of the stained glass window is: «Lyon - Gubian-Roy - 1871», but the three depicted stained glass windows are obviously from the same workshop. The other stained glass windows probably too.