Category
Ciphers, Codes and Artifacts
Objects and texts that exist, can be examined, and have not been read.
30 records
Records in this category
| Record | Case | Date | Status |
|---|---|---|---|
| AR-0020 | The Voynich Manuscript An illustrated codex written in an unknown script. Still undeciphered after a century of attempts. | c. 1404 to 1438 | Unsolved |
| AR-0021 | The Zodiac Ciphers Four ciphers. Two solved, one of them only in 2020. The sender was never identified. | 1969 onward | Partially explained |
| AR-0022 | Kryptos An encrypted sculpture at CIA headquarters. Three sections solved; the fourth is still open. | 1990 | Partially explained |
| AR-0023 | The Phaistos Disc Stamped symbols on Bronze Age clay, undeciphered. Authenticity has occasionally been questioned. | c. 1700 BCE | Unsolved |
| AR-0024 | The Antikythera Mechanism A corroded geared device from a shipwreck, identified as an ancient astronomical calculator. | c. 2nd to 1st century BCE | Later explained |
| AR-0025 | The Beale Ciphers Three ciphertexts said to locate a buried treasure. The story is older than the words it uses. | 1885 pamphlet | Debunked |
| AR-0066 | Rongorongo The only writing system ever developed in Oceania. Nobody alive can read it. | Recorded from 1864 | Unsolved |
| AR-0067 | Linear A Its successor, Linear B, was cracked in 1952. Linear A has resisted everything since. | c. 1800 to 1450 BCE | Unsolved |
| AR-0068 | The Indus Script Thousands of inscriptions from a Bronze Age civilisation. It is not even agreed that it is writing. | c. 2600 to 1900 BCE | Unsolved |
| AR-0069 | The Copiale Cipher 105 encrypted pages. Cracked in 2011 by machine translation. It was a secret society devoted to the eye. | c. 1760 to 1780 | Later explained |
| AR-0070 | The Dorabella Cipher Eighty-seven characters, written by Edward Elgar to a friend. Never read. | 14 July 1897 | Unsolved |
| AR-0071 | The Rohonc Codex Four hundred pages in an unknown script. Long called a forgery, and still not securely read. | Surfaced 1838 | Partially explained |
| AR-0072 | The Baghdad Battery The ancient battery that was not a battery. It has no leads, and the vessels resemble known scroll jars. | c. 250 BCE to 650 CE | Debunked |
| AR-0073 | The Oak Island Money Pit Two centuries of digging. The geology of the island explains most of what was found. | 1795 to present | Partially explained |
| AR-0074 | The Crystal Skulls Pre-Columbian, supposedly. Electron microscopy found rotary tool marks that did not exist in the Americas. | Surfaced from the 1860s | Debunked |
| AR-0103 | Piltdown Man Presented in 1912 as an early human from a Sussex gravel pit. It was a recent orangutan jaw and human skull pieces, filed and stained. | 1912 to 1953 | Debunked |
| AR-0110 | The Shroud of Turin A linen cloth with the image of a crucified man. Radiocarbon dates it to 1260 to 1390; how the image was made is not established. | Documented from the 1350s | Partially explained |
| AR-0117 | The Vinland Map Unveiled in 1965 as a pre-Columbian map of Norse America. The parchment is medieval; the ink holds a pigment of the 1920s. | 1965 to 2021 | Debunked |
| AR-0124 | Mary, Queen of Scots' Lost Letters Cipher letters catalogued in Paris as Italian papers of the early 1500s. Deciphered, they proved to be Mary, Queen of Scots' letters from captivity. | 1578 to 1584 | Later explained |
| AR-0131 | The Shugborough Inscription Eight letters under an 18th-century marble copy of a Poussin at Shugborough Hall. Many readings fit them; none can be checked against anything else. | Mid-18th century | Unsolved |
| AR-0138 | The Nebra Sky Disc A bronze disc inlaid with a gold sky, looted in 1999 and seized in 2002. Its date comes from swords buried with it, a link disputed in 2020. | c. 1600 BC; found 1999 | Partially explained |
| AR-0145 | The Kensington Runestone A stone found on a Minnesota farm in 1898 tells of Norsemen in 1362. Its runes and grammar belong to the Swedish of the 19th century. | Found 1898 | Debunked |
| AR-0152 | Roman Dodecahedra Hollow, twelve-sided bronze objects from Roman Gaul, the Germanies and Britain. About 134 are known, and no ancient text says what they were for. | c. AD 200 to late 4th century | Unsolved |
| AR-0159 | The Lycurgus Cup A Roman glass cup that is green in reflected light and red with light behind it. The cause is silver-gold nanoparticles formed in the glass. | 4th century AD; explained 1990 | Later explained |
| AR-0166 | Greek Fire A Byzantine incendiary liquid, projected through tubes from warships, first recorded in the 670s. Its recipe was a state secret, and none survives. | From the 670s | Unsolved |
| AR-0173 | The Cardiff Giant A ten-foot 'petrified man' dug up near Cardiff, New York, in 1869 drew paying crowds. It was a gypsum statue carved in Chicago the year before. | 1869 | Debunked |
| AR-0187 | Proto-Elamite One of the earliest scripts: some 1,700 tablets from Iran, still mostly unread. | c. 3300 to 2900 BC | Unsolved |
| AR-0188 | The Ricky McCormick Notes Two coded notes in a dead man’s pockets, published by the FBI in 2011, still unread. | 1999 to present | Unsolved |
| AR-0189 | The Chaocipher A 1918 cipher its inventor called unbreakable. Its method went public 92 years later. | 1918 to 2016 | Later explained |
| AR-0190 | The Dropa Stones Alien stone discs that trace back to a 1962 German vegetarian magazine. | 1962 to present | Debunked |