Wikipedia : "The Nasīr al-Mulk Mosque (Persian: مسجد نصیر الملك - Masjed-e Naseer ol Molk) or Pink Mosque is a traditional mosque in Shiraz, Iran, located in Goade-e-Araban place (near the famous Shah Cheragh mosque). The mosque was built during the Qājār era, and is still in use under protection by Nasir al Mulk's Endowment Foundation. It was built by the order of Mirza Hasan Ali Nasir al Molk, one of the lords of the Qajar Dynasty, in 1876 and was finished in 1888. The designers were Muhammad Hasan-e-Memar and Muhammad Reza Kashi Paz-e-Shirazi. The mosque extensively uses colored glass in its facade, and it displays other traditional elements such as panj kāseh-i (five concaves) in its design. It is also named in popular culture as Pink Mosque due to the usage of beautiful pink color tiles for its interior design."
Wikipedia: "A cistern (Middle English cisterne, from Latin cisterna, from cista, "box", from Greek κίστη kistê, "basket") is a waterproof receptacle for holding liquids, usually water. Cisterns are often built to catch and store rainwater. Cisterns are distinguished from wells by their waterproof linings."
Shiraz is the fifth most populated city in Iran and the capital of Fars Province. It is located in the southwest of Iran, has a moderate climate and has been a regional trade center for more than a thousand years.The earliest reference to the city, is on Elamite clay tablets dated to 2000 BC. In the 13th century, Shiraz became a leading center of the arts and letters, thanks to the encouragement of its ruler and the presence of many Persian scholars and artists. Shiraz was the capital of Persia during the Zand dynasty from 1750 until 1781, as well as briefly during the Saffavid period.Shiraz is known as the city of poets, wine and flowers. It is also considered by many Iranians to be the city of gardens, due to the many gardens and fruit trees that can be seen in the city. Shiraz has had major Jewish and Christian communities.