In 2005, an important change took place in the effort to preserve this magnificent church. Under then-Archbishop Raymond Burke, Saint Francis de Sales was erected as an Oratory of the Institute of Christ the King Sovereign Priest, serving Saint Louis as the premier center of the Extraordinary Form of the Roman Rite. Since the architecture and the interior of Saint Francis de Sales were originally designed for this use of the Roman Rite, the church was perfectly suited for this new endeavor.
With its new mission, the appeal of Saint Francis de Sales would be extended beyond the boundaries of the original parish, and beyond any singular demographic group. For the first time, there was hope that the deserted infrastructure would slowly regain active and purposeful use. The perfect balance between usage and preservation would be an effective means of safeguarding a cultural treasure of Saint Louis.