Ha'penny Bridge over Liffey River, Dublin, Ireland

The Ha'penny Bridge (Irish: Droichead na Leathphingine, or Droichead na Life), known later for a time as the Penny Ha'penny Bridge, and officially the Liffey Bridge, is a pedestrian bridge built in 1816 over the River Liffey in Dublin, Ireland.Made of cast iron, the bridge was cast at Coalbrookdale in Shropshire, England. Originally called the Wellington Bridge (after the Duke of Wellington), the name of the bridge changed to Liffey Bridge. The Liffey Bridge (Irish: Droichead na Life) remains the bridge's official name to this day, although it is most commonly referred to as the Ha'penny Bridge. Before the Ha'penny Bridge was built there were seven ferries, operated by a William Walsh, across the Liffey. The ferries were in a bad condition and Walsh was informed that he had to either fix them or build a bridge. Walsh chose the latter option and was granted the right to extract a ha'penny toll from anyone crossing it for 100 years.^{[citation needed]} Initially the toll charge was based, not on the cost of construction, but to match the charges levied by the ferries it replaced. A further condition of construction was that, if the citizens of Dublin found the bridge and toll to be "objectionable" within its first year of operation, it was to be removed at no cost to the city.

The toll was increased for a time to a Penny Ha'penny (one and a half pence), but was eventually dropped in 1919. While the toll was in operation, there were turnstiles at either end of the bridge.