This volume is concerned with the religious architecture of the Sultanate of Oman, a missing chapter in the art history of the Islamic world. It originates from a series of lectures delivered in 1988. The book may be seen by the specialist as the first available documentation of buildings that are fully entitled to enter the corpus of the historic monuments of the Arabian Peninsular and now fills a gap in the general knowledge of Arabian Islamic architecture, giving Oman a proper place on the world map of Islamic Art. An important section considers the calligraphic texts recorded on several decorated mihrabs. Text translations and commentaries have been undertaken by Eros Baldissera, Professor of Arabic at the University of Venice.