Palimpsest in the context of "Archimedes Palimpsest"

A lost literary work (referred throughout this article just as a lost work) is a document, literary work, or piece of multimedia, produced of which no surviving copies are known to exist, meaning it can be known only through reference, or literary fragments. This term most commonly applies to works from the classical world, although it is increasingly used in relation to modern works. A work may be lost to history through the destruction of an original manuscript and all later copies.

Works—or, commonly, small fragments of works—have survived by being found by archaeologists during investigations, or accidentally by laypersons such as, for example, the finding Nag Hammadi library scrolls. Works also survived when they were reused as bookbinding materials, quoted or included in other works, or as palimpsests, where an original document is imperfectly erased so the substrate on which it was written can be reused. The discovery, in 1822, of Cicero's De re publica was one of the first major recoveries of a lost ancient text from a palimpsest. Another famous example is the discovery of the Archimedes Palimpsest, which was used to make a prayer book almost 300 years after the original work was written. A work may be recovered in a library, as a lost or mislabeled codex, or as a part of another book or codex.

The Geographica (Ancient Greek: Γεωγραφικά, Geōgraphiká; Latin: Geographica or Strabonis Rerum Geographicarum Libri XVII, "Strabo's 17 Books on Geographical Topics") or Geography, is an encyclopedia of geographical knowledge, consisting of 17 'books', written in Greek in the late first century BC, or early first century AD, and attributed to Strabo, an educated citizen of the Roman Empire of Greek descent. There is a fragmentary palimpsest dating to the fifth century. The earliest manuscripts of books 1–9 date to the tenth century, with a thirteenth-century manuscript containing the entire text.

Christian Palestinian Aramaic was a Western Aramaic dialect used by the Melkite Christian community, predominantly of Jewish descent, in Palestine, Transjordan and Sinai between the fifth and thirteenth centuries. It is preserved in inscriptions, manuscripts (mostly palimpsests, less papyri in the first period) and amulets. All the medieval Western Aramaic dialects are defined by religious community. CPA is closely related to its counterparts, Jewish Palestinian Aramaic (JPA) and Samaritan Aramaic (SA). CPA shows a specific vocabulary that is often not paralleled in the adjacent Western Aramaic dialects.

The Sanaa palimpsest (also Ṣanʽā’ 1 or DAM 01-27.1) or Sanaa Quran is one of the oldest Quranic manuscripts in existence. Part of a sizable cache of Quranic and non-Quranic fragments discovered in Yemen during a 1972 restoration of the Great Mosque of Sanaa, the manuscript was identified as a palimpsest Quran in 1981 as it is written on parchment and comprises two layers of text.

• The upper text entirely conforms to the standard Uthmanic Quran in text and in the standard order of surahs (chapters).
• The lower text, which was erased and written over by the upper text, but can still be read with the help of ultraviolet light and computer processing, contains many variations from the standard text. The sequence of its chapters corresponds to no known Quranic order.

A partial reconstruction of the lower text was published in 2012, and a reconstruction of the legible portions of both lower and upper texts of the 38 folios in the Sana'a House of Manuscripts was published in 2017 utilising post-processed digital images of the lower text. A radiocarbon analysis has dated the parchment of one of the detached leaves sold at auction, and hence its lower text, to between 578 AD (44 BH) and 669 AD (49 AH) with a 95% accuracy. The earliest leaves have been tested at three laboratories and dated to 388–535 AD. Other folios have similar early dates.

De re publica (On the Republic; see below) is a dialogue on Roman politics by Cicero, written in six books between 54 and 51 BC. The work does not survive in a complete state, and large parts are missing. The surviving sections derive from excerpts preserved in later works and from an incomplete palimpsest uncovered in 1819. Cicero uses the work to explain Roman constitutional theory. Written in imitation of Plato's Republic, it takes the form of a Socratic dialogue in which Scipio Aemilianus takes the role of a wise old man.

The work examines the type of government that had been established in Rome since the kings. The development of the constitution is explained, and Cicero explores the different types of constitutions and the roles played by citizens in government. The work is also known for the Dream of Scipio, a fictional dream vision from the sixth book.

The Codex Ephraemi Rescriptus (Paris, National Library of France, Greek 9) is a manuscript of the Greek Bible, written on parchment. It is designated by the siglum C or 04 in the Gregory-Aland numbering of New Testament manuscripts, and δ 3 (in the von Soden numbering of New Testament manuscripts. It contains most of the New Testament and some Old Testament books, with sizeable portions missing. It is one of the four great uncials (these being manuscripts which originally contained the whole of both the Old and New Testaments). The manuscript is not intact: its current condition contains material from every New Testament book except 2 Thessalonians and 2 John; however, only six books of the Greek Old Testament are represented. It is not known whether 2 Thessalonians and 2 John were excluded on purpose, or whether no fragment of either epistle happened to survive.

The manuscript is a palimpsest, with the pages being washed of their original text, and reused in the 12th century for the Greek translations of 38 treatises composed by Ephrem the Syrian, from whence it gets its name Ephraemi Rescriptus.