Bengal roofs
Bengal roofs are dome-shaped roofs with drawn-down corners associated with late Mughal and Rajput architecture of Northern India. It is believed that stone roofs of this type did not emerge until the 16th century and can be traced back to rural models with straw or reed roofs in the rainy regions of Bengal. Description. Characteristic features of the Bengal roofs are the broad partial dome-like shape of the roof with runners down the corners. There are several common types of Bengal roofs: the "do-chala" type has only two hanging roof tips on each side  of a roof divided in the middle by a ridge; in the rare "char-chala" type, the two roof halves are fused into one unit and have a dome-like shape; the double-storey "at-chala" type has eight roof corners, four on each level. History. Such roof forms appeared for the first time in the 16th century. Early examples are in the Bengali ruined city of Gaur, including the Mausoleum of Fateh Khan, the son of a general of the Mughal Emperor Aurangzeb. Distribution. Two of the first Mughal buildings with echoes of Bengal roof shapes are the two  outbuildings of the private palace ("Khas Mahal") built by Shah Jahan around 1635 for two of his daughters in the Red Fort of Agra. A few decades later, his son Aurangzeb constructed the roof of the Pearl Mosque ("Moti Masjid") in the Red Fort of Delhi in a similar manner. However, it is especially notable in the architecture of the Rajput princes and merchants of Rajasthan, especially the countless jaroka-the roofs of the 1799 Palace of the Winds ("Hawa Mahal") in Jaipur, and the roofs of the houses of rich merchants ("havelis") in Jaisalmer, Mandawa and elsewhere. Some of  the later memorial pavillons ("chattris"), built in the 18th and 19th centuries on the incineration sites of the Hindu princes of Jaisalmer and their family members, are also covered with such roofs. Similarly, since the 19th century, the builders of many Sikh temples have used this element as the coronation of their gurdwara, especially Maharaja Ranjit Singh at the Golden Temple of Amritsar.