Vat. Ar. abbreviates Vaticani arabi, a collection within the Vatican Library. Notable works within this collection include the following:
Vat. Ar. 5, Psalter in Arabic Vat. Ar. 182, Al-Razi's Al-Tibb al-Ruhani Vat. Ar. 204, Naskh-Ottoman Quran manuscript Vat. Ar. 230, Quran manuscript Vat. ar. 319, 13th century diagram of the Tusi couple, by Tusi Vat. Ar. 368, The Story of Bayad and Riyad, 13th-century Arabic love story Vat. ar. 657, Eliya ibn ʿUbaid's Concordance of Faith Vat. Ar. 709, Quran manuscript Vat. Ar. 782, 16thC copy of Galland Manuscript Vat. Ar. 924, Quran manuscript, small circle of 45mm diameter, Octagonal case Vat. Ar. 931, Quran manuscript Vat. Ar. 1484, Quran manuscript, largest in library, 540x420mm. Vat. Ar. 1605/1, additional folia to the Codex Parisino-petropolitanus