The commune can be accessed by the D401 road from Saint-Jean-Pied-de-Port in the northwest to the village. From the village the D118 road goes north to join the D18 highway.[5]
Hydrography
Located in the drainage basin of the Adour, the northeastern border of the commune is marked by the Laurhibar river, which flows north to join the Nive north of Saint-Jean-Pied-de-Port. A stream rises near the village and flows to the Laurhibar in the north-east. The Urtchipea rises in the south of the commune and flows northwest gathering many tributaries and joins the Nive de Beherobie at Saint-Michel. The Sassitako erreka rises southwest of the village and flows northwest joining the Laurhibar east of Saint-Jean-Pied-de-Port.
The commune name in basque is Aintzila meaning "hill of mud",[6]Aintzila[7] or Aintzil-Harrieta.[8]
Jean-Baptiste Orpustan wrote the name of the commune in the form Aïncille. He also indicated that in Basque the inhabitants are referred to as Aintzildar.[7]
The following table details the origins of the commune name.
Quarterly, first Azure a bridge of Or masoned in sable debruised over a wave of argent in base, in chief 3 stars the same arranged in fesse; second of Or with an eagle displayed in sable; three vert a cow of Or collared and belled in azure posed in base surmounted by a sheep of argent horned in Or; fourth azure with a church in Or in profile roofed the same extended at dexter with a porch abased and surmounted at dexter by a belltower and steeple the same supporting a cross in sable, windows and doors the same..
Aincille had long received saline (saline of Ugarré) since the 17th century and had the distinction of being a corporation with ownership of twenty-nine old houses of the town[15] and was reunited with the royal domain in 1683.
Culture and heritage
Languages
According to the Map of the Seven Basque Provinces published in 1863 by Prince Louis-Lucien Bonaparte, the dialect of Basque spoken in Aincille is Eastern Low Navarrese.
Civil heritage
The commune has several sites that are registered as historical monuments:
The Parish Church of the Assumption of the Blessed Virgin Mary and Saint John the Baptist (Middle Ages)[21] The church contains two items that are registered as historical objects: