Lupitus of Barcelona
Lupitus of Barcelona, identified with a Christian archdeacon called Sunifred, was an astronomer in late 10th century Barcelona, then part of the Marca Hispanica between Islamic Al-Andalus and Christian France (in 985 changing from Christian back into Muslim hands by the conquest of Al-Mansur).
Lupitus was instrumental in the transfer of Arabic mathematics, including the astrolabe and the Hindu-Arabic numeral system to Christian Europe. Gerbert of Aurillac in a letter of 984 asks Lupitus for a translation of an Arabic astronomical treatise, the Sententiae astrolabii.
- Juan Vernet, The pursuit of learning - Moorish rule in Spain - Al-Andalus: where three worlds met, UNESCO Courier, Dec 1991. 
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