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Bremen Cathedral

Bremen Cathedral (German: Bremer Dom or St. Petri Dom zu Bremen), dedicated to St. Peter, is a church situated in the market square in the center of Bremen, in northern Germany. The cathedral belongs to the Bremian Evangelical Church, a member of the Protestant umbrella organisation named Evangelical Church in Germany. It is the proto-cathedral of the former Prince-Archbishopric of Bremen. The cathedral has twin 99 meter towers referred to as the north tower and the south tower. The towers were constructed flanking the main entrance portal on the west front of the church between 1215 and 1253. In 1346 the towers were strengthened and given pyramidal tops of uneven heights. When the towers were restored and raised in the 1890s they were given Rhenish "helmets," which still cap the towers today. It is possible to climb the south tower for a view of the city. The north tower remains closed. The crossing tower is a reminder of the original style of the west front towers with a pyramidal cap. During the Middle Ages the towers had eight bells. Today the towers house the cathedral's four bells. The north tower has three bells. The oldest surviving bell is the "Maria Gloriosa" cast in 1433 by the famous bell maker Ghert Klinghe. The other bells were removed and melted down for the war effort in World War II. In 1951 two bells, "Hansa" and "Felicitas", were donated to the cathedral by former residents living abroad. In 1962 a prominent Bremen family donated a fourth bell, the "Brema," which hangs in the south tower. The Brema weighs 7000 kg.

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Lampshade

A lampshade is a fixture that covers the lightbulb on a lamp to diffuse the light it emits. Conical, cylindrical and other forms on floor-, desk- or table top-mounted as well as suspended lamp models are the most common and are made in a wide range of materials. The term can also apply to the glass hung under many designs of ceiling lamp. Beyond its practical purpose, significant emphasis is also usually given to decorative and aesthetic features. History[edit] In the late 17th-century in Paris the first public lanterns made their appearance in the centre of the streets. They lit the road during the night. In 1763, the réverberes made their appearance. These were oil lamps with reflectors which were hung above the center of streets. The first public oil lamps in Milan, financed by revenues from a lottery, date from 1785. These were lanterns containing an oil lamp with a number of wicks. A semi-spherical reflector above the flame projected the light downwards, while another reflector, slightly concave and near the flame, served to direct the light latterly. An Argand oil lamp in use with a glass shade, 1822. Adjustable tole (painted tin) candleshade in a Russian portrait, ca 1830s Friedrich Albert Winsor first had the idea of industrialising lighting by producing gas in a factory and distributing it through a pipeline. In the first decades of the 19th century, competing gas companies laid the first gas mains in major cities. But there were fears of explosion and toxicity. The flame fed by the gas coming out of the nozzle was intense, uniform and adjustable, white and brilliant instead of the reddish or orange of oil lamps or candles. The drawbacks of gas lighting were overheating of the air and extremely high oxygen consumption, making it necessary to ventilate the room or isolate the flame by separating the room where the combustion took place from the room being lit. Theatre audiences regularly suffered from headaches and the sulphur and ammonia formed during combustion of the gas ruined furniture. Gas light had to be filtered by opal glass or light fabric shades. Lampshades were no longer used to direct the light but to attenuate it. In 1879, Joseph Swan and Thomas Edison independently developed—combining and perfecting existing elements deriving from the research of Humphry Davy, De Moleyn and Göbel—the incandescent filament electric light bulb. To disguise the intense electric light, lampshades were used. Some were made by Tiffany in coloured glass. The great advantage of the electric light bulb was the absence of flame and traces of combustion, thus avoiding all risks of intoxication, explosion or fire. In the beginning, the filament was made of carbonised vegetable fibres, then bamboo fibres and finally metal alloys until, in the early 20th century, the tungsten filament invented in 1904 became established. Today lamp shades are more than mere covers for lamps. They add to the decor of the room and more importantly are determined by the role that they have to play. The lamp shades is essencial to the interior architecture.