The Spire of Dublin, alternatively titled the Monument of Light (Irish: An Túr Solais), is a large, stainless steel, pin-like monument 120 metres (390 ft) in height, located on the site of the former Nelson’s Pillar on O’Connell Streetin Dublin, Ireland.

The spire was designed by Ian Ritchie Architects, who sought an “Elegant and dynamic simplicity bridging art and technology”. The contract was awarded to SIAC-Radley JV and it was manufactured by Radley Engineering of Dungarvan, County Waterford, and erected by SIAC Construction Ltd & GDW Engineering Ltd.

The first section was installed on 18 December 2002.^]Construction of the sculpture was delayed because of difficulty in obtaining planning permission and environmental regulations. The Spire consists of eight hollow stainless steel cone sections, the longest being 20 m (66 ft), which were installed on 21 January 2003. It 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 features two tuned mass dampers,designed by engineers Arup, to counteract sway. The steel underwent shot peening to alter the quality of light reflected from it.