Saint Léon was organized around its church (Saint Léon) and extended to the "Port of Beyries" and "to the Arritzague Stream". The church dates back to 1089. Two parishes seem to have been identified: Saint Léon and Brindos. However, before the end of the 16th century, Bayonne was taken from the English by the Kingdom of France and the suburbs were demolished (Saint Léon, Marracq, and Beyris) as being too close and too prejudicial to the defence of the walled city, which concentrated within the confines of the existing small and large Bayonne (which explains the density and height of buildings in the centre of Bayonne). France was wary of Spain who tried several times to capture Bayonne (1523 and 1552). In 1557, the Saint Léon church was demolished and transferred to its current location in 1564 in front of the current town hall of Anglet. As Manex Goyhenetche points out in his book on Anglet, the city was then "the surrounding countryside of Bayonne", "densely populated rural suburb of peasants". It was more than a single entity, but a set of different districts including religious buildings (chapels) which have disappeared today. It was a large rural territory dominated by a topography of landforms (plateaus and terraces) and lower parts (Barthes and streams) covered various agricultural operations, woods, orchards, vineyards, and mills which lived on agriculture and cattle. The rivalry between Anglet and Bayonne Bayonne then had a monopoly on trade and fishing in the whole basin of the Adour from Biarritz to Capbreton. Bayonne tried to master the marshy strip of land that was once on the left bank of the river when the natural mouth of the Adour was much further north (located in the tenth century at Cape Breton then, after yet another quirk of the River, at Vieux Boucau from 1310 to 1578). The major event of this period was the diversion of the Adour. Trade in Bayonne declined due to the remoteness of the river mouth and especially the silting of the Adour that prevented large vessels enter the estuary. Louis de Foix, an engineer sent by the king, succeeded, after many efforts using local labour, in diverting the river to allow an exit for the Adour only from Bayonne. Rivalries and conflicts between Anglet and Bayonne continued for the jurisdiction and rights over this sandy strip of land that was now cut in half,