Roof lantern

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The lantern over the dome of the Florence Baptistery, dated to 1150 Laternebap.jpg
The lantern over the dome of the Florence Baptistery, dated to 1150
A cupola-shaped lantern on 16th-century Seville Cathedral, Andalusia, Spain View From Seville Cathedral 02.jpg
A cupola-shaped lantern on 16th-century Seville Cathedral, Andalusia, Spain
The 6th-century Hagia Sophia's upper dome acts as a roof lantern Ayasofya-Innenansicht.jpg
The 6th-century Hagia Sophia's upper dome acts as a roof lantern

A roof lantern is a daylighting architectural element. Architectural lanterns are part of a larger roof and provide natural light into the space or room below. In contemporary use it is an architectural skylight structure.

Contents

A lantern roof will generally mean just the roof of a lantern structure in the West, but has a special meaning in Indian architecture (mostly Buddhist, and stretching into Central Asia and eastern China), where it means a dome-like roof raised by sets of four straight beams placed above each other, "arranged in diminishing squares", and rotated with each set. Normally such a "lantern" is enclosed and provides no light at all. [2]

The term roof top lantern is sometimes used to describe the lamps on roofs of taxis in Japan, designed to reflect the cultural heritage of Japanese paper lanterns.

History

The glazed lantern was developed during the Middle Ages, one notable medieval example being that atop the 14th-century Octagon Tower at Ely Cathedral in England. Roof lanterns of masonry and glass were used in Renaissance architecture, such as in principal cathedrals. In 16th-century France and Italy, they began usage in orangeries, an early form of a conservatory structure with tall windows and a glazed roof section for wintering citrus trees and other plants in non-temperate climates.

Post-Renaissance roof lanterns were made of timber and glass and were often prone to leaking.

Initially wood-framed in the 18th and 19th centuries, skylights became even more popular in metal construction with the advent of sheet-metal shops during the Victorian era. Virtually every urban row house of the late-19th and early-20th centuries relied upon a metal-framed skylight to illuminate its enclosed stairwell. More elaborate dwellings of the era showed a fondness for the roof lantern, in which the humble ceiling-window design of the skylight is elaborated into a miniature glass-paneled conservatory-style roof cupola or tower. [3]

Present day

Modern lanterns benefit from advances in glazing and sealing techniques, plus the development of high performance insulated glass and sealants, which reduce energy loss and provide water-tightness in the same manner as conventional skylights. Typically, roof lanterns are constructed using wood, UPVC or aluminium, or a combination of those materials.

They serve as an architectural feature, distinguished from commercial manufactured skylights by their custom design, providing unique views to the outdoors. Roof lanterns for residential homes are usually constructed using a combination of triangular and trapezoidal segments, fitted within a UPVC or aluminium frame. [4] Traditional architectural styles characterise most roof lanterns in the UK. In the U.S., where the term 'custom' skylight is often used, modern styles of roof lanterns are also common in the building vernacular.

See also

Related Research Articles

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In architecture, an atrium is a large open-air or skylight-covered space surrounded by a building. Atria were a common feature in Ancient Roman dwellings, providing light and ventilation to the interior. Modern atria, as developed in the late 19th and 20th centuries, are often several stories high, with a glazed roof or large windows, and often located immediately beyond a building's main entrance doors.

<span class="mw-page-title-main">Sunroom</span> Room with large glass windows or walls for exposure to sunlight

A sunroom, also frequently called a solarium, is a room that permits abundant daylight and views of the landscape while sheltering from adverse weather. Sunroom and solarium have the same denotation: solarium is Latin for "place of sun[light]". Solaria of various forms have been erected throughout European history. Currently, the sunroom or solarium is popular in Europe, Canada, the United States, Australia, and New Zealand. Sunrooms may feature passive solar building design to heat and illuminate them.

This page is a glossary of architecture.

<span class="mw-page-title-main">Cast-iron architecture</span> Buildings that make extensive use of cast iron in their structures

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<span class="mw-page-title-main">Teruel Cathedral</span> UNESCO World Heritage Site

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<span class="mw-page-title-main">Skylight</span> Window in the ceiling-roof

A skylight is a light-permitting structure or window, usually made of transparent or translucent glass, that forms all or part of the roof space of a building for daylighting and ventilation purposes.

<span class="mw-page-title-main">History of medieval Arabic and Western European domes</span> Domes in religious architecture

The early domes of the Middle Ages, particularly in those areas recently under Byzantine control, were an extension of earlier Roman architecture. The domed church architecture of Italy from the sixth to the eighth centuries followed that of the Byzantine provinces and, although this influence diminishes under Charlemagne, it continued on in Venice, Southern Italy, and Sicily. Charlemagne's Palatine Chapel is a notable exception, being influenced by Byzantine models from Ravenna and Constantinople. The Dome of the Rock, an Umayyad Muslim religious shrine built in Jerusalem, was designed similarly to nearby Byzantine martyria and Christian churches. Domes were also built as part of Muslim palaces, throne halls, pavilions, and baths, and blended elements of both Byzantine and Persian architecture, using both pendentives and squinches. The origin of the crossed-arch dome type is debated, but the earliest known example is from the tenth century at the Great Mosque of Córdoba. In Egypt, a "keel" shaped dome profile was characteristic of Fatimid architecture. The use of squinches became widespread in the Islamic world by the tenth and eleventh centuries. Bulbous domes were used to cover large buildings in Syria after the eleventh century, following an architectural revival there, and the present shape of the Dome of the Rock's dome likely dates from this time.

<span class="mw-page-title-main">History of early modern period domes</span>

Domes built in the 16th, 17th, and 18th centuries relied primarily on empirical techniques and oral traditions rather than the architectural treatises of the time, but the study of dome structures changed radically due to developments in mathematics and the study of statics. Analytical approaches were developed and the ideal shape for a dome was debated, but these approaches were often considered too theoretical to be used in construction.

<span class="mw-page-title-main">History of modern period domes</span>

Domes built in the 19th, 20th, and 21st centuries benefited from more efficient techniques for producing iron and steel as well as advances in structural analysis.

References

  1. Horn, Walter. "Romanesque Churches in Florence: A Study in Their Chronology and Stylistic Development". The Art Bulletin. Vol. 25, No. 2 (Jun., 1943), pp. 112-131.
  2. Rowland, Benjamin, The Art and Architecture of India: Buddhist, Hindu, Jain, 1967 (3rd edn.), pp. 173, 194, Pelican History of Art, Penguin, ISBN   0140561021
  3. "Skylights & Roof Lanterns". Archived from the original on 2008-10-19.
  4. "Roof Lanterns, Pyramid & Octagonal". Duplus. Retrieved 2021-01-20.