Isaac ben Joseph Israeli of Toledo
Yesod Olam, Fundamentum mundi, The Foundation of the World, 1309



Oxford, Bodleian Library, MS. Reggio 6, Catalogue reference: Neubauer 2045, Date: 1401 - 1450

Oxford, Bodleian Library, MS. Huntington 299, Catalogue reference: Neubauer 2043, Date: 1484

Oxford, Bodleian Library, MS. Pococke 368, Catalogue reference: Neubauer 2044, Date: 1476 - 1500

British Library, MS Add. 15977, Date : 1400-1499

Biblioteca vaticana, Vat.ebr.380, Late 15th century, fols 1r–213v: Yiśraʾeli, Yitsḥaḳ ben Yosef, ספר יסוד עולם Yesod Olam

Liber Jesod Olam seu Fundamentum Mundi, Opus astronomicum celeberrimum, auctore R. Isaac Israeli, hispano, versionem B. Goldberg & L. Rosenktanz, Berlin, 1846-1848



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