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Trajan's Column Location Trajan's Forum Built in 107~113 AD Built by/for Emperor Trajan Type of structure Roman triumphal column Related Forum of Trajan Trajan's Column Trajan's Column (Italian: Colonna Traiana , Latin: COLVMNA·TRAIANI ) is a Roman triumphal column in Rome, Italy, that commemorates Roman emperor Trajan's victory in the Dacian Wars. It was probably constructed under the supervision of the architect Apollodorus of Damascus at the order of the Roman Senate. It is located in Trajan's Forum, built near the Quirinal Hill, north of the Roman Forum. Completed in AD 113, the freestanding column is most famous for its spiral bas relief, which artistically represents the wars between the Romans and Dacians (101–102 and 105–106). Its design has inspired numerous victory columns, both ancient and modern. The structure is about 30 metres (98 feet) in height, 35 metres (115 feet) including its large pedestal. The shaft is m...

This article is about the shape. For the shape of deoxyribonucleic acid, see Double helix. For other uses, see Helix (disambiguation). The right-handed helix (cos t , sin t , t ) from t = 0 to 4π with arrowheads showing direction of increasing t A helix ( / ˈ h iː l ɪ k s / ), plural helixes or helices ( / ˈ h ɛ l ɪ s iː z / ), is a type of smooth space curve, i.e. a curve in three-dimensional space. It has the property that the tangent line at any point makes a constant angle with a fixed line called the axis . Examples of helices are coil springs and the handrails of spiral staircases. A "filled-in" helix – for example, a "spiral" (helical) ramp – is called a helicoid. [1] Helices are important in biology, as the DNA molecule is formed as two intertwined helices, and many proteins have helical substructures, known as alpha helices. The word helix comes from the Greek word ἕλιξ , "twisted, curved". [2] Contents 1 Types 2 Mathem...