Dating from the 16th century, the chapel at the entrance to the property was originally called the Chapelle Saint-Vennec before being correctly renamed by the rector of Combrit and becoming Chapelle Notre-Dame de la Clarté.

Saint Vennec, the son of Saint Fragan and Sainte-Gwen, was born in Brittany around 460. Brother of the well-known Saint Guénolé (founder of the Abbaye de Landevennec (Abbey), and twin brother to Saint-Jacut, founder of the Abbaye de Londouar, thereafter called Saint Jacut, Vennec started out as a warrior before becoming a monk.

In neo-Gothic style, the chapel consists in its early form of a two bay choir with aisle, a narrow low nave and a central pointed arch. Destroyed by fire between 1890 and 1892 caused by careless extinguishing of candles, its reconstruction took place later on in the 1904 giving rise to this difference in building. The old section was made of regular rubble work while the recent is made of freestone. Two coats of arms have been preserved: one in the outside gable displaying an escutcheon held by two sand griffons representing the imperial eagle used on the Kerlazret arms, the other in the bell tower bearing an escutcheon with a sand greyhound with a “grêlier” (hunting horn) above for the arms of Penmorvan de Penfoul.

The main stained-glass window was executed in 1943 based on the designs by Pauline de la Jarrigue and worked by Mozart-Lecour Verriers (stained-glass artists). It portrays the procession of the faithful on the day of a religious festival and their visit to the fountain, linked to the mysteries of the rosary. The phylactery unfolds from one scene to the next with the inscription “Klévit Mouez O Bugale” “Hear the voice of your children”. This stained-glass window also represents the story of a miracle which occurred at the Clarté fountain in 1891. A farmer from Elliant called Guillaume Grall who had gone blind, promised the Virgin that, if cured, he would sell his favourite white mare “Jeannette” and give the proceeds to the poor. The day of the local festival at Clarté, the holy water at the fountain restored his sight but he cheated by selling a different horse and, as a result, went blind again. He returned on the same pilgrimage in 1892 and the miracle happened again. This time Guillaume Grall sold his white mare and gave the money to the needy.

Some time around the 18th century the devotions and pilgrimage to Notre-Dame de la Clarté replaced those customarily reserved for Saint Vennec. Thereafter, Notre-Dame was naturally prayed to for sight problems, and the fountain water used to this end.