 The displaced parishioners were able in 1628 to take over as their church the "grand temple", a former Protestant church adjacent to the site of the medieval St. Barthélémy, only to find in 1648, on the creation of the Diocese of La Rochelle, that the new chapter wished to use it as the cathedral.The parishioners therefore built a new church of St. Barthélémy nearby, which was completed in 1678.The older church however burnt down in 1687 and the chapter moved into the new church, which they and the parish were obliged to share until the consecration of the new cathedral in 1784.