The first historical records of the Castle of Giomici date back to 1100. Its history is strictly connected with the town of Gubbio, on which it depended. The church is dedicated to St. Michael the Archangel. This is probably due to the Lombard tradition of naming churches - especially the ones near the borders of the Diocese - after the Archangel warrior, a protector of Christians; in fact, Giomici is located outside the territory of Gubbio and in front of Assisi and Perugia, Gubbio’s perennial rivals.
The church has some interesting fresco fragments on two walls; at least thee of these frescoes (Annunciation, St. Michael the Archangel and St. Sebastian) are ascribed to renowned painter Matteo da Gualdo. The other frescoes and a painting representing St. Anastasius as the protector of the gnomic, are votive artworks by wanderer artists of the Umbrian school.
For over one hundred years the church was the site of burial of members of the Vagni family; this custom was abolished in the early nineteenth century with the promulgation of the Napoleonic codes, which forbid burying the dead in places of worship.
Today, clergyman Don Bruno Baldoni of Valfabbrica regularly celebrates mass at the church on weekends and holidays.