Facing north from north side of Al-Masjid al-Nabawi (The mosque of the Prophet)
"Al-Masjid al-Nabawi (Arabic: المسجد النبوي [mæsʤıd ænːæbæwiː] "Mosque of the Prophet"), often called the Prophet's Mosque, is a mosque situated in the city of Medina. As the final resting place of the Islamic Prophet Muhammad, it is considered the second holiest site in Islam by both Shia and Sunni Muslims (the first being the Masjid al-Haram in Mecca) and is the second largest mosque in the world."
"One of the most notable features of the site is the Green Dome over the center of the mosque, where the tomb of Muhammad is located. It is not exactly known when the green dome was constructed but manuscripts dating to the early 12th century describe the dome. It is known as the Dome of the Prophet or the Green Dome. Subsequent Islamic rulers greatly expanded and decorated it. Early Muslim leaders Abu Bakr and Umar are buried in an adjacent area in the mosque."
"The site was originally Muhammad's house; he settled there after his Hijra (emigration) to Medina, later building a mosque on the grounds. He himself shared in the heavy work of construction. The original mosque was an open-air building. " From: en.wikipedia.org/wiki/Masjid_Nabawi
"...17m x 18m retractable umbrellas create the effect of a translucent vault, providing protection from the desert sun. At night, the umbrellas can be closed to promote the natural cooling of the court floor. These umbrellas have been in continuous service since 1992." From: www.tenarafabric.com/medina.html
More umbrellas have been added over the years, covering the entire masjid's exterior marble floor.