For instance, Muhammad's footprints can be found at the aforementioned Topkapi Palace in Istanbul, Turkey, at the Shrine of the Holy Footprint in Delhi, India, and at the Dome of the Rock in Jerusalem.
Saint Clare of Assisi was also known for her beautiful hair, so in addition to her other body remains, Saint Clare's hair is also kept at Basilica di Santa Chiara in Assisi, Italy.
And if her head is not enough, Saint Catherine of Siena's hand is also on display.
The beard of prophet Muhammad is not the only important relic in the Muslim world. His footprint is also kept.
Saint Catherine of Siena started having visions of Jesus when she was a child and was eventually canonized in 1461. You can see her head at Saint Dominic's Basilica in Siena, Italy.
The Mandylion is kept at the Redemptoris Mater Chapel, formerly known as the Matilde Chapel, in the Vatican Palace.
This glass reliquary containing hairs of Muhammad's beard is kept at the Topkapi Palace in Istanbul, Turkey. It was supposedly cut posthumously by his barber, Salman the Persian.
But before the Shroud, there was the Mandylion, also known as the Image of Edessa.
These relics actually go on tour. Here's a golden statuette containing the tongue, vocal cards, and floating rib of Saint Anthony, at Saint Mary's Basilica in Secunderabad, India.
The Mandylion is essentially a piece of cloth with the face of Jesus imprinted. The image is believed to be the oldest depiction of Christ in the world.
The tongue (along with other parts) are still kept in Padua to this day. This is a drawing of the reliquary of the incorrupt tongue of Saint Anthony.
Saint Anthony of Padua died in 1231, but upon exhumation apparently all his body had decomposed, other than his tongue, jaw, and vocal cords. The miracle was attributed to his amazing oratorical skills.
How would you like to check out a tooth that reportedly keeps growing and has healing powers?
But there's a twist: various places claim to have the real relic. This specific magic 2-inch-long (5 cm) molar is kept in a Buddhist temple in Rosemead, California. But the Temple of the Tooth in Sri Lanka also claims to hold one.
The Mouth of Truth will supposedly bite your hand off if you tell a lie. So, looking at a saint's skull and getting your hand bitten off by a giant marble mask—not a bad day out, right?
The milk of the Virgin Mary was good enough for the son of God, so it must have some amazing properties, right? Well, a 12th-century miracle tells us that indeed it does.
While you can't travel back in time to the 12th century and witness the miracle, you can visit the Milk Grotto, near Bethlehem. This is where supposedly Our Lady spilled a drop of milk and turned the stone there white.
Sources: (Grunge)
Former bishop Januarius died circa 305 CE as a martyr. He is a saint of the Catholic and the Eastern Orthodox Churches.
Januarius' ancient blood is said to turn liquid when it's placed near his skull; a ritual that is still performed to this day.
Legend has it that the Virgin Mary appeared to monk Bernard of Clairvaux and sprinkled milk into his mouth, which cured an eye infection and granted him wisdom. This miracle is known as the Lactation of Saint Bernard.
His body was exhumed when he was canonized in 1083, and according to historical reports, his right hand was in perfect condition while the rest of his body had decomposed. It was cut off and preserved as a valued relic. Each year on August 20, St. Stephen's Day in Hungary, the hand is taken from its resting place and marched around the city in celebration of the saint.
In the Basilica of St. Stephen in Budapest, a strange relic is displayed in an ornate golden reliquary. It's said to be the right hand of St. Stephen, a saint who died around 1,000 years ago, and is known as "The Holy Right."
Still, if you are in the area and pop into the basilica, why not also pay a visit to the famous Bocca della Verità ("Mouth of Truth")?
Who said romance is dead? Instead of celebrating Valentine's the traditional way, why not head to the Basilica di Santa Maria in Cosmedin, Rome, and pay a visit to the saint's skull?
Though no one can tell for sure if this is the real skull of the original patron saint of lovers. This is because there are many more churches claiming to hold the saint's relics.
The Shroud of Turin is a linen cloth containing the negative image (dark where it should be bright) of a man. This man is believed to be Jesus, and this was supposedly his burial cloth.
The Shroud is kept in the Cathedral of Saint John the Baptist in Turin, Italy, for over four centuries.
The solid blood is also said to liquify on other occasions, such as when the Pope visited Naples.
But there's more! Singapore also claims to hold Siddhartha Gautama's remains at the Buddha Tooth Relic Temple and Museum. And if you thought the other tooth was long, the one housed here measures nearly 3 inches (7.5 cm)!
Roman Catholic priest Camillus de Lellis is known for taking care of the sick and for being the founder of the religious order of the Camillians. He was canonized in 1746 and became the patron saint of the sick and medical professionals.
Saint Camillus had such a generous heart that it was actually preserved after he died. The heart relic is kept at the generalate house of the Order of the Ministers of the Sick (the Camillians), but has toured other countries, such as the Philippines.
A follower of Francis of Assisi, Saint Clare went on to found the Order of Poor Ladies. Interestingly, she's the patron saint of television and computer screens!
Many religious relics have been kept over the centuries, and many of these are not only considered sacred, they're also believed to have special powers. A tooth that keeps growing? How about 1700-year-old blood that liquefies? As odd as they sound, these religious relics are treasured and venerated by millions of people.
Intrigued? Click through the following gallery and discover the world's most intriguing religious relics.
Famous religious relics and their histories
From tongues to teeth!
LIFESTYLE Jesus shroud
Many religious relics have been kept over the centuries, and many of these are not only considered sacred, they're also believed to have special powers. A tooth that keeps growing? How about 1700-year-old blood that liquefies? As odd as they sound, these religious relics are treasured and venerated by millions of people.
Intrigued? Click through the following gallery and discover the world's most intriguing religious relics.