other major cities, including Córdoba (113°, 120°, 135°, 150°, and 180° were recorded in the 12th century) and Samarkand (180°, 225°, 230°, 240°, and 270° were recorded in the 11th century). According to the doctrine of jihat al-ka'bah, the diverse directions of qiblas are still valid as long as they are still in the same broad direction. In Mecca itself, many early mosques were constructed that were not directly facing the Kaaba. In 1990, the scholar of geography Michael E. Bonine conducted a survey of the main mosques of all major cities in present-day Morocco—constructed from the Idrisid period (8th–10th centuries) up to the Alaouite period (17th century to present). While modern calculations yield the qiblas of between 91° (almost due east) in Marrakesh and 97° in Tangier, only mosques constructed in the Alaouite period are constructed with qiblas relatively close to this range. The qibla of older mosques vary considerably, with concentrations occurring between 155°–160° (slightly east of south) as well as 120°–130° (almost southeast). In 2008, Bonine also published a survey of the main city mosques of Tunisia, in which he found that most were aligned close to 147°. This is the direction of the Great Mosque of Kairouan, originally built in 670 and last rebuilt by the Aghlabids in 862, which is often credited as the model used by the other mosques. Among the mosques surveyed, the Great Mosque of Sousse was the only one with a significant difference, facing further south at 163°. The actual direction to Mecca as calculated using the great circle method ranges from 110° to 113° throughout the country. Indonesia Variations of the qibla also occur in Indonesia, the country with the world's largest Muslim population. The astronomically calculated qibla ranges from 291°—295° (21°—25° north of west) depending on the exact location in the archipelago. However, the qibla is often known traditionally simply as "the west", resulting in mosques built oriented due west or to the direction of sunset—which varies slightly throughout the year. Different opinions exist among Indonesian Islamic astronomers: Tono Saksono et al. argues in 2018 that facing the qibla during prayers is more of a "spiritual prerequisite" than a precise physical one, and that an exact direction to the Kaaba itself from thousands of kilometres away requires an extreme precision impossible to achieve when building a mosque or when standing for prayers. On the other hand, Muhammad Hadi Bashori