This is an open access title distributed under the terms of the CC BY-NC 4.0 license, which permits any non-commercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. Further information and the complete license text can be found at https://creativecommons.org/licenses/by-nc/4.0/The terms of the CC license apply only to the original material. The use of material from other sources (indicated by a reference) such as diagrams, illustrations, photos and text samples may require further permission from the respective copyright holder.Cover illustration: Antique photograph of a cemetery on the slopes of Mount Qāsyūn in Damascus, which is where al-Wāsiṭī is said to have been buried. Photo: istockphoto.com/ilbusca.The Library of Congress Cataloging-in-Publication Data is available online at http://catalog.loc.govLC record available at http://lccn.loc.gov/2020026828Typeface for the Latin, Greek, and Cyrillic scripts: “Brill”. See and download: brill.com/brill-typeface.issn 2468-0087isbn 978-90-04-43129-4 (hardback)isbn 978-90-04-37755-4 (e-book)Copyright 2020 by Arjan Post. Published by Koninklijke Brill NV, Leiden, The Netherlands.Koninklijke Brill NV incorporates the imprints Brill, Brill Hes & De Graaf, Brill Nijhoff, Brill Rodopi, Brill Sense, Hotei Publishing, mentis Verlag, Verlag Ferdinand Schöningh and Wilhelm Fink Verlag.Koninklijke Brill NV reserves the right to protect this publication against unauthorized use.This book is printed on acid-free paper and produced in a sustainable manner.