Spire of Dublin, Dublin City

Spire of Dublin, Dublin City

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The Spire of Dublin, alternatively titled the Monument of Light (Irish: An Túr Solais), is a large, stainless steel, pin-like monument 121.2 metres (398 ft) in height, located on the site of the former Nelson's Pillar on O'Connell Street in Dublin, Ireland.It is, in fact, the world's tallest sculpture.

The spire was designed by Ian Ritchie Architects, who sought an "Elegant and dynamic simplicity bridging art and technology". The first section was installed on 18 December 2002. Five additional 20 m (66 ft) sections were added with the last one installed on 21 January 2003.
The spire is an elongated cone of diameter 3 m (9.8 ft) at the base, narrowing to 15 cm (5.9 in) at the top.
 
It is constructed from eight hollow tubes of stainless steel and features a tuned mass damper, designed by engineers Arup, to counteract sway. The steel underwent shot peening in order to subtly reflect the light falling on it.
 
From its base up to about 10m, the stainless steel is partially polished in an abstract design to provide a slightly higher reflective surface than the remainder of the Spire. The pattern is based on a core sample of earth and rock formation taken from the ground where the spire stands.
 
During the day it maintains its steel look, but at dusk the monument appears to merge into the sky. The base of the monument is lit and the top 12 m (39 ft) is illuminated to provide a beacon in the night sky across the city.

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