Sana'a manuscript

The Sana'a palimpsest, dubbed Ṣanʿā’ 1, is one of the oldest Quranic manuscripts in existence. Part of a sizable cache Quranic and non-Quranic fragments discovered in Yemen during a 1972 restoration of the Great Mosque of Sana'a, the manuscript was identified as a palimpsest Quran in 1981. It is written on parchment, and comprises two layers of text (see palimpsest). The upper text largely conforms to the standard 'Uthmanic Quran, whereas the lower text contains many variants to the standard text. A partial reconstruction of the lower text was published in 2012, and a further reconstruction on different principles was published in 2016. A radiocarbon analysis has dated the parchment to before 671 AD with a 99% accuracy.

The Sana'a palimpsest is one of the most important manuscripts of the collection in the world.

In 1972, construction workers renovating a wall in the attic of the Great Mosque of Sana'a in Yemen came across large quantities of old manuscripts and parchments, many of which were deteriorated. Not realizing their significance, the workers gathered up the documents, packed them away into some twenty potato sacks, and left them on the staircase of one of the mosque's minarets.

Qadhi Isma'il al-Akwa', then the president of the Yemeni Antiquities Authority, realized the potential importance of the find. Al-Akwa' sought international assistance in examining and preserving the fragments, and in 1979 managed to interest a visiting German scholar, who in turn persuaded the West German government to organize and fund a restoration project. The preserved fragments comprise Quranic and non-Quranic material.

Restoration of the fragments began in 1980 under the supervision of the Yemeni Department for Antiquities. It was funded by the Cultural Section of the German Foreign Ministry. The find includes 12,000 Quranic parchment fragments. All of them, except 1500–2000 fragments, were assigned to 926 distinct Quranic manuscripts as of 1997. None is complete and many contain only a few folios apiece. "Albrecht Noth (University of Hamburg) was the director of the project. Work on the ground began in 1981 and continued through the end of 1989, when the project terminated with the end of funding. Gerd R. Puin (University of Saarland) was the director beginning with 1981. His involvement came to an end in 1985, when Hans-Caspar Graf von Bothmer (University of Saarland) took over as the local director. Bothmer left Ṣan'ā' in the following year, but continued to run the project from Germany, traveling to the site almost every year.

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