The Spire of Dublin, alternatively titled the Monument of Light, 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 Street, the main thoroughfare of Dublin, Ireland.

Nelson's Pillar was a large granite column capped by a statue of Horatio Nelson, built in the centre of what was then Sackville Street in Dublin, Ireland. Completed in 1809 when Ireland was part of the United Kingdom, it survived until March 1966, when it was severely damaged by explosives planted by Irish republicans. Its remnants were later destroyed by the Irish Army.