The tomb of Blessed Frederic Ozanam is located in the crypt of the historic church of St. Joseph des Carmes in Paris. The church was the scene of some of the bloodiest massacres of ecclesiastics of the infamous Reign of Terror during the French Revolution. Visitors now see a much different tomb setting than the original 19th century design. The changes were done sometime in the mid-twentieth century.
Next, two pictures: first the original tomb and following a picture of the crypt nowadays: