Allouville Seine Maritime, Chêne Chapelle. The Chêne Chapelle is an oak tree located in Allouville-Bellefosse in Seine-Maritime, France. The oak tree is between 800 and 1,200 years old. The hollow trunk hosts two chapels, which were built there in 1669: Notre Dame de la Paix (&quot;Our Lady of Peace&quot;) and the Chambre de l&#x27;Ermite (&quot;Hermit&#x27;s room&quot;). A spiral staircase around the trunk provides access to the chapels.