In geometry, an octagon (from Ancient Greek ὀκτάγωνον (oktágōnon) 'eight angles') is an eight-sided polygon or 8-gon.
A regular octagon has Schläfli symbol {8} and can also be constructed as a quasiregular truncated square, t{4}, which alternates two types of edges. A truncated octagon, t{8} is a hexadecagon, {16}. A 3D analog of the octagon can be the rhombicuboctahedron with the triangular faces on it like the replaced edges, if one considers the octagon to be a truncated square.
The Florence Baptistery, also known as the Baptistery of Saint John (Italian: Battistero di San Giovanni), is a religious building in Florence, Italy. Dedicated to the patron saint of the city, John the Baptist, it has been a focus of religious, civic, and artistic life since its completion. The octagonal baptistery stands in both the Piazza del Duomo and the Piazza San Giovanni, between Florence Cathedral and the Archbishop's Palace.
Florentine infants were originally baptized in large groups on Holy Saturday and Pentecost in a five-basin baptismal font located at the center of the building. Over the course of the 13th century, individual baptisms soon after birth became common, so less apparatus was necessary. Around 1370 a small font was commissioned, which is still in use today. The original font, disused, was dismantled in 1577 by Francesco I de' Medici to make room for grand-ducal celebrations, an act deplored by Florentines at the time.
A symbol is a mark, sign, or word that indicates, signifies, or is understood as representing an idea, object, relationship, or mathematical formula. Symbols allow people to go beyond what is known or seen by creating linkages between otherwise different concepts and experiences. All communication is achieved through the use of symbols: for example, a red octagon is a common symbol for "STOP"; on maps, blue lines often represent rivers; and a red rose often symbolizes love and compassion. Numerals are symbols for numbers; letters of an alphabet may be symbols for certain phonemes; and personal names are symbols representing individuals. The academic study of symbols is called semiotics.
In the arts, symbolism is the use of a concrete element to represent a more abstract idea. In cartography, an organized collection of symbols forms a legend for a map.
A stop sign is a traffic sign designed to notify drivers that they must come to a complete stop and make sure the intersection (or railroad crossing) is safely clear of vehicles and pedestrians before continuing past the sign. In many countries, the sign is a red octagon with the word STOP, in either English, the national language of that particular country, or both, displayed in white or yellow. The Vienna Convention on Road Signs and Signals also allows an alternative version: a red circle with a red inverted triangle with either a white or yellow background, and a black or dark blue STOP. Some countries may also use other types, such as Japan's inverted red triangle stop sign. Particular regulations regarding appearance, installation, and compliance with the signs vary by some jurisdictions.
48°13′35″N 12°40′36″E / 48.22626°N 12.67654°EThe Shrine of Our Lady of Altötting, also known as the Chapel of Grace (German: Gnadenkapelle), is the national shrine of Bavaria dedicated to the Blessed Virgin Mary. It is known for the many healings which are said to have taken place there, and is commonly called the Lourdes of Germany.
The octagonal chapel which now houses the image of Our Lady was built around 660 A.D., and is the oldest Marian shrine in Germany. This image of Mary is what is known as a Black Madonna. It was created possibly around 1330 A.D. and carved from lindenwood. The identity of the artist who carved the "Black Madonna" of Altötting is not definitively known. The parish chronicle mentions that the image was sculpted by a "holy hermit" in Altötting.
A coffin or casket is a funerary box used for viewing or keeping a corpse, for burial, entombment or cremation. Coffins are sometimes referred to as caskets, particularly in American English.
A distinction is commonly drawn between "coffins" and "caskets", using "coffin" to refer to a tapered hexagonal or octagonal (also considered to be anthropoidal in shape) box and "casket" to refer to a rectangular box, often with a split lid used for viewing the deceased as seen in the picture. Receptacles for cremated and cremulated human ashes (sometimes called cremains) are called urns.
Strasbourg Cathedral or the Cathedral of Our Lady of Strasbourg (French: Cathédrale Notre-Dame de Strasbourg, or Cathédrale de Strasbourg, German: Liebfrauenmünster zu Straßburg), also known as Strasbourg Minster (German: Straßburger Münster), is a Catholic cathedral in Strasbourg, Alsace, France. Although considerable parts of it are still in Romanesque architecture, it is widely considered to be among the finest examples of Rayonnant Gothic architecture. Architect Erwin von Steinbach is credited for major contributions from 1277 to his death in 1318, and beyond through his son Johannes von Steinbach, and his grandson Gerlach von Steinbach, who succeeded him as chief architects. The Steinbachs' plans for the completion of the cathedral were not followed through by the chief architects who took over after them, and instead of the originally envisioned two spires, a single, octagonal tower with an elongated, octagonal crowning was built on the northern side of the west facade by master Ulrich Ensingen and his successor, Johannes Hültz. The construction of the cathedral, which had started in the year 1015 and had been relaunched in 1190, was finished in 1439.
Standing in the centre of the Place de la Cathédrale, at 142 metres (466 feet), Strasbourg Cathedral was the world's tallest building from 1647 to 1874 (227 years), when it was surpassed by St. Nikolai's Church, Hamburg. Today it is the sixth-tallest church in the world and the tallest extant structure built entirely in the Middle Ages.