Annales Islamologiques 50

English summary: The 50th issue of the Annales islamologiques includes a folder and varia, as was the case of the preceding issues. The folder, entitled "Batir, exposer, restaurer: une histoire architecturale de l'Egypte moderne," is edited by Mercedes Volait. An introduction and six articles explore the large variety of contexts in which architecture bloomed between the mid-19th century and the 1960s. This period witnessed the reinvention of Coptic and Islamic tradition as well as the development of building activities through orders from companies (e.g. Suez Canal Company), the aristocracy (e.g. 'Imad al-Din street in Cairo) or later on the state (e.g. fairs and exhibitions). Articles are accompanied by a rich and mostly unpublished iconography. Five articles of varia, in French, in English and in Arabic, complete this issue. Three of them publish sources: two arabic papyri from the end of the 8th or the 9th century, and a paper stemming from the documents of al-Haram al-Sarif, which sheds light on the situation of the non-Muslims in Mamluk Jerusalem. The two other articles deal with the science of Hadith in the medieval period, and with musicians and singers in Ibn Iyas' chronicle (beginning of the 16th century). French description: Le volume 50 des Annales islamologiques comprend, comme les precedents, un dossier et des varia. Le dossier, intitule " Batir, exposer, restaurer: une histoire architecturale de l'Egypte moderne," a ete coordonne par Mercedes Volait. Son introduction et ses six articles explorent la grande variete des contextes dans lesquels s'est epanouie l'architecture entre le milieu du XIXe siecle et les annees 1960, de la reinvention de la tradition copte et islamique a la commande patronale (Compagnie du canal de Suez), aristocratique (rue 'Imad al-Din au Caire) ou plus tard nationale (foires et expositions). Les articles sont accompagnes d'une riche iconographie, pour une large part inedite. Cinq articles de varia, en francais, en anglais et en arabe, completent ce numero. Trois d'entre eux publient des sources: deux papyrus arabes de la fin du VIIIe ou du IXe siecle, et un papier issu des documents du Haram Sarif, qui eclaire sur la situation des non-Musulmans dans la Jerusalem mamelouke. Les deux autres articles portent sur la science du Hadith a l'epoque medievale, et sur les musiciens et chanteurs dans la chronique d'Ibn Iyas' (debut XVIe siecle).