"A tented roof is a type of polygonal hipped roof with steeply pitched slopes rising to a peak. Tented roofs, a hallmark of medieval religious architecture, ...
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were widely used to cover churches with steep, conical roof structures.
In the Queen Anne Victorian style, it took the form of a wooden turret with an octagonal base with steeply pitched slopes rising to a peak, usually topped with a finial.
A distinctive local adaptation of this roof style was widely used in 16th- and 17th-century Russian architecture for churches, although there are examples of this style also in other parts of Europe. It took the form of a polygonal spire but differed in purpose in that it was typically used to roof the main internal space of a church, rather than as an auxiliary structure. The same architectural form is also applied to bell towers." - (en.wikipedia.org 28.09.2019)