Subject: Ile de la Conférence
Date: Feb 22, 2001 @ 13:10
Author: Peter Smaardijk (Peter Smaardijk <peter.smaardijk@and.com>)
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At http://www.multimania.com/nivelle/ile.html , as you already know, there is a picture of the
Franco-Spanish condominium Ile de la Conférence. This tiny island in the boundary river Bidassoa is
part of the two countries at the same time. This situation dates back a very long time, at least to
1659, when the Pyrenees treaty was signed here. In 1661 king Louis XIV picked up his bride, the
infante Maria-Teresia, on the island, and went to St. Jean-de-Luz (Donibane Lohizune), where they
were married.

There is some confusion about the name and/or location of the island. Very often, the name you find
in the literature is Ile des Faisans/Isla de los Faisanes (Pheasant Island). According to a detailed
study by Jacques Descheemaeker on the island, the condominium is the small Ile de la Conférence, and
not the much larger Ile des Faisans, which nowadays doesn't exist anymore. It is now an industrial
estate in the municipality of Hendaye (Hendaia), and the small stream dividing it from the French
mainland no longer exists. The confusion remains in the treaty of Bayonne (demarcation of the
Franco-Spanish boundary, 1856), art. 27:

"The Ile des Faisans, also known by the name Ile de la Conférence, with which are connected so many
common historical memories for the two Nations, will belong, undivided, to France and Spain.
The respective border authorities will come to agreement for the repression of all crime committed
on the soil of this island.
The two Governments will take all measures, in agreement, deemed necessary in order to preserve this
island from destruction, which threatens it, and to undertake, jointly funded, works that they will
judge to be useful for its conservation and embellishment."

Source: Traité pour déterminer la frontière depuis l'embouchure de la Bidassoa jusqu'au point où
confinent le Département des Basses-Pyrénées, l'Aragon et la Navarre, signé à Bayonne (2 décembre
1856) (I have a copy of this treaty)
Jacques Descheemaeker, "La Bidassoa et l'Ile de la Conférence", in Eusko-Jakintza, no. 2, 1947

I'm including a scan of the 1:25K Topo map (IGN) and a drawing made by Descheemaeker.

Peter