Bulla (seal)
Encyclopedia
Bulla is a type of seal
Seal (device)
A seal can be a figure impressed in wax, clay, or some other medium, or embossed on paper, with the purpose of authenticating a document ; but the term can also mean the device for making such impressions, being essentially a mould with the mirror image of the design carved in sunken- relief or...

 impression. It comes in two forms: metal and clay
Clay
Clay is a general term including many combinations of one or more clay minerals with traces of metal oxides and organic matter. Geologic clay deposits are mostly composed of phyllosilicate minerals containing variable amounts of water trapped in the mineral structure.- Formation :Clay minerals...

.

Clay bullae

The original bulla was a lump of clay molded around a cord
Cord
Cord may refer to:* String or rope* Cord , a trimming made of multiple strands of yarn twisted together* The spinal cord* Cord Automobile, a former American car marque founded by Errett Lobban Cord* The cord , used to measure firewood...

 and stamped with a seal
Stamp seal
The stamp seal is a carved object, usually stone, first made in the 4th millennium BC, and probably earlier. They were used to impress their picture or inscription into soft, prepared clay....

. When dry, the container (such as a vase
Vase
The vase is an open container, often used to hold cut flowers. It can be made from a number of materials including ceramics and glass. The vase is often decorated and thus used to extend the beauty of its contents....

 or money bag
Money bag
A money bag is a bag of money used to hold and transport coins and banknotes from/to a mint, bank, ATM, milled, business, or other institution...

) cannot be violated without visible damage to the bulla, thereby ensuring the contents remain tamper-proof
Tamper resistance
Tamper resistance is resistance to tampering by either the normal users of a product, package, or system or others with physical access to it. There are many reasons for employing tamper resistance....

 until they reach their destination.

Bullae from antiquity appear in two distinct forms:
  • A lump surrounding a dangling cord (as with much later wax bullae and papal bull
    Papal bull
    A Papal bull is a particular type of letters patent or charter issued by a Pope of the Catholic Church. It is named after the bulla that was appended to the end in order to authenticate it....

    s made of lead rather than clay)
  • A flat, disc-shaped lump pressed against a cord surrounding a folded document (such as papyrus
    Papyrus
    Papyrus is a thick paper-like material produced from the pith of the papyrus plant, Cyperus papyrus, a wetland sedge that was once abundant in the Nile Delta of Egypt....

     or vellum
    Vellum
    Vellum is mammal skin prepared for writing or printing on, to produce single pages, scrolls, codices or books. It is generally smooth and durable, although there are great variations depending on preparation, the quality of the skin and the type of animal used...

    )


In many cases, fingerprint
Fingerprint
A fingerprint in its narrow sense is an impression left by the friction ridges of a human finger. In a wider use of the term, fingerprints are the traces of an impression from the friction ridges of any part of a human hand. A print from the foot can also leave an impression of friction ridges...

s of the person who made the impression remain visible near the border of the seal in the clay.

Metal bullae

The term bulla was eventually applied to seals made out of metal. Although the most typical form of bulla was made of lead
Lead
Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

, it was sometimes made of gold
Gold
Gold is a chemical element with the symbol Au and an atomic number of 79. Gold is a dense, soft, shiny, malleable and ductile metal. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. Chemically, gold is a...

, as the ones affixed to the several Golden Bull
Golden Bull
A Golden Bull or chrysobull was a golden ornament representing a seal , attached to a decree issued by Byzantine Emperors and later by monarchs in Europe during the Middle Ages and Renaissance. The term was originally coined for the golden seal itself but came to be applied to the entire decree...

s issued by the Byzantine Emperors, Holy Roman Emperor
Holy Roman Emperor
The Holy Roman Emperor is a term used by historians to denote a medieval ruler who, as German King, had also received the title of "Emperor of the Romans" from the Pope...

s, and various other monarchs in the Middle Ages. A particularly famous type of lead bulla is the one affixed to important documents issued by the Pope
Pope
The Pope is the Bishop of Rome, a position that makes him the leader of the worldwide Catholic Church . In the Catholic Church, the Pope is regarded as the successor of Saint Peter, the Apostle...

, called Papal bull
Papal bull
A Papal bull is a particular type of letters patent or charter issued by a Pope of the Catholic Church. It is named after the bulla that was appended to the end in order to authenticate it....

s for the type of seal, where the bulla has an image of Saints Peter
Saint Peter
Saint Peter or Simon Peter was an early Christian leader, who is featured prominently in the New Testament Gospels and the Acts of the Apostles. The son of John or of Jonah and from the village of Bethsaida in the province of Galilee, his brother Andrew was also an apostle...

 and Paul
Paul of Tarsus
Paul the Apostle , also known as Saul of Tarsus, is described in the Christian New Testament as one of the most influential early Christian missionaries, with the writings ascribed to him by the church forming a considerable portion of the New Testament...

 on one side and the name of the issuing Pope on the other.

Gallery of bullae

See also

  • Bulla (amulet)
    Bulla (amulet)
    Bulla, an amulet worn like a locket, was given to male children in Ancient Rome nine days after birth. They were enigmatic objects of lead covered in gold foil. A bulla was worn around the neck as a locket to protect against evil spirits and forces. A bulla was made of differing substances...

  • Papal bull
    Papal bull
    A Papal bull is a particular type of letters patent or charter issued by a Pope of the Catholic Church. It is named after the bulla that was appended to the end in order to authenticate it....

  • List of artifacts significant to the Bible
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