Vincent de Paul (†1660) seems to have known of it, for his Daughters of Charity have always worn it attached to their beads, and for many years it was only made, at least in France, for them.
Vincent de Paul (died 1660) appears to have known about it, as his Daughters of Charity have consistently worn it attached to their necklaces, and for a long time, it was exclusively made, at least in France, for them.