Skylight in the context of Roof

A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air. Modern windows are usually glazed or covered in some other transparent or translucent material, a sash set in a frame in the opening; the sash and frame are also referred to as a window. Many glazed windows may be opened, to allow ventilation, or closed to exclude inclement weather. Windows may have a latch or similar mechanism to lock the window shut or to hold it open by various amounts.

Types include the eyebrow window, fixed windows, hexagonal windows, single-hung, and double-hung sash windows, horizontal sliding sash windows, casement windows, awning windows, hopper windows, tilt, and slide windows (often door-sized), tilt and turn windows, transom windows, sidelight windows, jalousie or louvered windows, clerestory windows, lancet windows, skylights, roof windows, roof lanterns, bay windows, oriel windows, thermal, or Diocletian, windows, picture windows, rose windows, emergency exit windows, stained glass windows, French windows, panel windows, double/triple-paned windows, and witch windows.

Daylighting is the practice of placing windows, skylights, other openings, and reflective surfaces so that direct or indirect sunlight can provide effective internal lighting. Particular attention is given to daylighting while designing a building when the aim is to maximize visual comfort or to reduce energy use. Energy savings can be achieved from the reduced use of artificial (electric) lighting or from passive solar heating. Artificial lighting energy use can be reduced by simply installing fewer electric lights where daylight is present or by automatically dimming or switching off electric lights in response to the presence of daylight – a process known as daylight harvesting.

The amount of daylight received in an internal space can be analyzed by measuring illuminance on a grid or undertaking a daylight factor calculation. Computer programs such as Radiance allow an architect or engineer to quickly calculate benefits of a particular design. The human eye's response to light is non-linear, so a more even distribution of the same amount of light makes a room appear brighter.

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.

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.

In architecture, an atrium (pl.: atria or atriums) 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 (in the lobby).

Atria are a popular design feature because they give their buildings a "feeling of space and light." The atrium has become a key feature of many buildings in recent years. Atria are popular with building users, building designers and building developers. Users like atria because they create a dynamic and stimulating interior that provides shelter from the external environment while maintaining a visual link with that environment. Designers enjoy the opportunity to create new types of spaces in buildings, and developers see atria as prestigious amenities that can increase commercial value and appeal.

Glass brick, also known as glass block, is an architectural element made from glass. The appearance of glass blocks can vary in color, size, texture and form. Glass bricks provide visual obscuration while admitting light. The modern glass block was developed from pre-existing prism lighting principles in the early 1900s to provide natural light in manufacturing plants. Glass bricks have several attributes that make them useful as a building material, providing insulation and admitting light while still allowing for privacy.

The first hollow glass block was patented in France on November 11th, 1886 by Swiss architect Gustave Falconnier [fr]. Mass production of glass blocks began in 1932, with the construction of the Owens-Illinois Glass Block building. It has had a varied popularity since, appearing in Streamline Moderne and Brutalist architecture. Today glass blocks are used in walls, skylights, and sidewalk lights.

Victor Pierre Horta (French: [viktɔʁ ɔʁta]; Victor, Baron Horta after 1932; 6 January 1861 – 8 September 1947) was a Belgian architect and designer, and one of the founders of the Art Nouveau movement. He was a fervent admirer of the French architectural theorist Eugène Viollet-le-Duc and his Hôtel Tassel in Brussels (1892–93), often considered the first Art Nouveau house, is based on the work of Viollet-le-Duc. The curving stylized vegetal forms that Horta used in turn influenced many others, including the French architect Hector Guimard, who used it in the first Art Nouveau apartment building he designed in Paris and in the entrances he designed for the Paris Metro. He is also considered a precursor of modern architecture for his open floor plans and his innovative use of iron, steel and glass.

Horta's later work moved away from Art Nouveau, and became more geometric and formal, with classical touches, such as columns. He made a highly original use of steel frames and skylights to bring light into the structures, open floor plans, and finely-designed decorative details. His later major works included the Maison du Peuple/Volkshuis (1895–1899), Brussels' Centre for Fine Arts (1923–1929) and Brussels-Central railway station (1913–1952). In 1932, King Albert I conferred on Horta the title of Baron for his services to the field of architecture.

A roof window or garret window is an outward opening window that is incorporated as part of the design of a roof. Often confused with a skylight, a roof window differs in a few basic ways. A roof window is often a good option when there is a desire to allow both light and fresh air into the space.

A roof window is different from a tubular skylight in that the light is not directed through any type of channel or tube in order to provide lighting for the interior of a building. This type of light tube design is often employed with buildings where the installation of a skylight or roof window is not practical.

A staircase or stairway is a flight or series of flights of stairs. It is used to connect walkways between floors so that one can move in height. A stairwell is a shaft in a building where a staircase is located. In buildings with several housing units, a stairway can be a necessary common area for getting to and from apartments.

Staircases provide vertical access to connected floors in a multi-story building, and are a functional part of it. Stairwells are often used to place several staircases vertically, one above the other. The entrance to elevators is often located in the stairwell. Sometimes the stairwell goes around the lift shaft, other times it is placed next to it.

A glazier is a tradesperson responsible for cutting, installing, and removing glass (and materials used as substitutes for glass, such as some plastics). They also refer to blueprints to figure out the size, shape, and location of the glass in the building. They may have to consider the type and size of scaffolding they need to stand on to fit and install the glass. Glaziers may work with glass in various surfaces and settings, such as cutting and installing windows, doors, shower doors, skylights, storefronts, display cases, mirrors, facades, interior walls, ceilings, and tabletops.

The Alexander Hamilton U.S. Custom House (originally the New York Custom House) is a government building, museum, and former custom house at 1 Bowling Green, near the southern end of Manhattan in New York City, New York, United States. Designed by Cass Gilbert in the Beaux-Arts style, it was erected from 1902 to 1907 by the government of the United States as a headquarters for the Port of New York's duty collection operations. The building contains the George Gustav Heye Center museum, the United States Bankruptcy Court for the Southern District of New York, and the New York regional offices of the National Archives. The facade and part of the interior are New York City designated landmarks, and the building is listed on both the New York State Register of Historic Places and the National Register of Historic Places (NRHP) as a National Historic Landmark. It is also a contributing property to the Wall Street Historic District, listed on the NRHP.

The Custom House is a seven-story steel-framed structure with a stone facade and elaborate interiors. The exterior is decorated with nautical motifs and sculptures by twelve artists. The second through fourth stories contain colonnades with Corinthian columns. The main entrance consists of a grand staircase flanked by Four Continents, a set of four statues by Daniel Chester French. The second-story entrance vestibule leads to a transverse lobby, a rotunda, and offices. The rotunda includes a skylight and ceiling murals by Reginald Marsh. The George Gustav Heye Center, a branch of the National Museum of the American Indian, operates on the ground and second stories, while the upper stories contain U.S. government offices.

A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air. Modern windows are usually glazed, or covered in some other transparent or translucent material, a sash set in a frame in the opening. The sash and frame are also referred to as a window. Many glazed windows may be opened, to allow ventilation, or closed to exclude inclement weather. Windows may have a latch or similar mechanism to lock the window shut or to hold it open by various amounts.

Types include the eyebrow window, fixed windows, hexagonal windows, single-hung, and double-hung sash windows, horizontal sliding sash windows, casement windows, awning windows, hopper windows, tilt, and slide windows (often door-sized), tilt and turn windows, transom windows, sidelight windows, jalousie or louvered windows, clerestory windows, lancet windows, skylights, roof windows, roof lanterns, bay windows, oriel windows, thermal, or Diocletian, windows, picture windows, rose windows, emergency exit windows, stained glass windows, French windows, panel windows, double/triple-paned windows, and witch windows.