This church was built in 1352, funded by Pope Celestine V from his own funds. The chapel once held the hearts of Henry II, Francis II, and Henry III, but by 1792, the church was no more and its gardens had become a barracks. The hearts of the kings were safely transferred to the Louvre, to Saint-Denis and to the museum of Versailles.*
* And there was you thinking the Royals were heartless.