The patron saint of Rhêmes-Saint-Georges is Saint George, celebrated on 23 April: the municipal coat of arms depicts the saint himself, with the red and black of the chief taking up the colours of the Duchy of Aosta, also present in the regional flag.
In the past the area of the present-day municipality was called Voix, for the echo formed by the valley walls at that point, as opposed to Cyvoix, which indicated today's municipality of Saint-Nicolas; the Greek word Rhêma, from which the valley's name derives, has the same meaning. Around 1400 the municipality took the name of its own patron, as also happened with Saint-Nicolas. In 1928 the fascist government merged the municipalities of Rhêmes-Notre-Dame and Rhêmes-Saint-Georges into a single entity, with Rhêmes-Saint-Georges as its main town; in 1939 the name was Italianised to Val di Rema, and that of the main town to San Giorgio di Rema.
The parish church of San Giorgio, in the hamlet of Vieux, dates from the 15th century and was rebuilt over the remains of the original church, already recorded in 1176: in Baroque style, the interior is adorned with Bohemian crystal chandeliers and a Valsesian wooden altar. In 2006 Pope Benedict XVI prayed there. Inside the church there is also a small museum of sacred art, gathering furnishings, statuettes and religious objects from both the parish church and other chapels of the valley.
