 Egyptian Journal of Archaeological and Restoration Studies "EJARS" An International peer-reviewed journal published bi-annually Volume 9, Issue 1, June - 2019: pp: 79-95 www. ejars.sohag-univ.edu.eg Original article MOSQUE OF OTHMAN IBN OGELBEK IN ALEPPO: AN ARCHITECTURAL ARCHAEOLOGICAL STUDY Abd al-razik, M. Islamic Archaeology dept., Faculty of Archaeology, Cairo Univ., Egypt E-mail: mansour.arch22@yahoo.com Received 29/8/2018 Accepted 5/4/2019 Abstract This paper aims to study Ogelbek mosque, which is considered to be one of the most important Mamluk mosques in the city of Aleppo (Syria). The paper made a descriptive and analytical study of the surviving architectural elements, decorations, and inscriptions of the studied mosque. This mosque was subjected to many renewal works after its construction; all of these works were documented in this study. The paper studied also the endowments which were allocated to the mosque by its founder, in addition to the Ottoman endowments. This paper is considered to be a documentation study to the mosque especially after the destruction which occurred to the whole Syrian monuments during the current events of the Syrian revolution. Many figures and plates are included in this study and they were published for the first time, noting that all the plates were taken by the author in July 2010. Keywords: Mosque, Main portal, Open courtyard, Inscriptions, Endowments 1. Introduction Aleppo is considered to be an important city in Asia. It is situated in the north of Syria and its importance comes in the second class after the capital Damascus [1,2]. The origin of the city did not relate to the Islamic period, but it has a great fame since the pre-Islamic period that many historical dynasties ruled the city since the beginning of the second century BC, and many monuments were left in the city by these historical dynasties [3,4]. The first monument which constructed in the city was the citadel which was the most famous military building around Syria, its origin goes back to the pre- Islamic period, it was an impenetrable fortress of the city, and through it, the city of Aleppo has stood against many enemies throughout the Islamic history [5-7]. The citadel was constructed above the hill of the city and around it; the districts of the city were constructed [8]. Also, the name of the city Aleppo did not relate to the Islamic period, but the city was called by this name since the coming of Ibrahim al-Khalil to it [9]. The fame of the city of Aleppo in Islamic period relates to its huge number of monuments, these monuments are characterized by their variety and their affiliation to different eras of Islamic history that represent a continuous chain from religious, civil, and military buildings [10]. The city was destroyed by the Mongols conquest in 658 A.H./1260 A.D., and the majority of its historical monuments were burned, but after the battle of Ain galoot -in the same year- the Mamluk sultans ruled the city and rebuilt the destructed build- ings by the Mongols [11]. The Mamluk sultans constructed many monuments on