The collar worn by a fourth-century saint resides in this church, and is still used for blessings to this day.

A monk spent 14 years carving steps through tuff to make this religious site more accessible to pilgrims.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

Two elaborately decorated "catacomb saints" are displayed on either side of the altar in a small church in Germany.