The Chêne chapelle is an oak

Oak

An oak is a tree or shrub in the genus Quercus , of which about 600 species exist. "Oak" may also appear in the names of species in related genera, notably Lithocarpus...

 tree located in Allouville-Bellefosse

Allouville-Bellefosse

Allouville-Bellefosse is a commune in the Seine-Maritime department in the Haute-Normandie region in northern France.-Geography:A farming village situated in the Pays de Caux, some northeast of Rouen at the junction of the D33, D34 and the D110 roads....

 in Seine-Maritime

Seine-Maritime

Seine-Maritime is a French department in the Haute-Normandie region in northern France. It is situated on the northern coast of France, at the mouth of the Seine, and includes the cities of Rouen and Le Havre...

, France.

The oak tree is between 800 and 1,200 year old. It is 15m high and its base has a circumference of 16m. Its hollow trunk hosts two chapels, which were built there in 1669: Notre Dame de la Paix ("Our Lady of Peace") and the Chambre de l'Ermite ("Hermit's room").
A spiral staircase around the trunk provides access to the chapels.

The oak is the site of a pilgrimage on August 15 (Assumption of Mary

Assumption of Mary

According to the belief of Christians of the Roman Catholic Church, Eastern Orthodoxy, Oriental Orthodoxy, and parts of the Anglican Communion and Continuing Anglicanism, the Assumption of Mary was the bodily taking up of the Virgin Mary into Heaven at the end of her life...

).

Other chapel oaks

Other chapel oaks exist in France:

• in Saint-Sulpice-le-Verdon
  Saint-Sulpice-le-Verdon
  Saint-Sulpice-le-Verdon is a commune in the Vendée department in the Pays de la Loire region in western France.-References:*...
  
  , Vendée
  Vendée
  The Vendée is a department in the Pays-de-la-Loire region in west central France, on the Atlantic Ocean. The name Vendée is taken from the Vendée river which runs through the south-eastern part of the department.-History:...
  
  
• in Villedieu-la-Blouère
  Villedieu-la-Blouère
  Villedieu-la-Blouère is a commune in the Maine-et-Loire department in western France....
  
  , Maine-et-Loire
  Maine-et-Loire
  Maine-et-Loire is a department in west-central France, in the Pays de la Loire region.- History :Maine-et-Loire is one of the original 83 departments created during the French Revolution on March 4, 1790. Originally it was called Mayenne-et-Loire, but its name was changed to Maine-et-Loire in 1791....