00000na 22 1 450680527Keywords: ʿAbd Allāh Ibn Ḥamza al-maʿrūf bi-Naṣīr al-Dīn al-Ṭūsī; Muʿtazilite kalām; Twelver Shīʿa; Naṣīr al-Dīn al-Ṭūsī; Muḥammad b. ʿAbd al-Karīm al-Shahrastānī; Fakhr al-Dīn al-Rāzī; Bahshamiyya; Abū l-Ḥusayn al-Baṣrī; shayʾiyyat al-maʿdūm; Quṭb al-Dīn al-Kayd(ḍ)urī al-Bayhaqī; ms Yale, Landberg 510; Ḥilla; Rayy; Bayhaq; Mashhad Philosophical Theology among Sixth/Twelfth-Century Twelver Shīʿites: From Naṣīr al-Dīn al-Ṭūsī (d. after 599/1201-2 or 600/1202-3) to Naṣīr al-Dīn al-Ṭūsī (d. 672/1274) Hassan Ansari ،Sabine SchmidtkearticleEnglish