The Church of the Trinity and San Giovanni (French: Église de la Trinité et de San Giovanni or Église de la Sainte-Trinité d'Aregno, "Church of the Holy Trinity of Aregno") is a Roman Catholic church in Aregno, Corsica.

It is a Romanesque and Pisan-style building and is about 40 metres (130 feet) higher than the rest of the commune.

On August 11, 1883, the church was declared a monument historique (a national heritage site of France).

[1] In 2011, an archaeological evaluation was carried out on the church's nave in favor of a restoration campaign.

One example is in the pinion in the vertical alignment of the door: it depicts a man removing a thorn from his foot; this is an allegory of knowledge and is fairly widespread in Romanesque buildings.