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O'Connell Bridge crosses the River Liffey in Dublin, joining O'Connell Street to D'Olier Street, Westmoreland Street and the South Quays.
The original bridge (named Carlisle Bridge for the then Lord Lieutenant of Ireland – Frederick Howard, 5th Earl of Carlisle) was designed by James Gandon, and built between 1791 and 1794.
Originally humped, and narrower, Carlisle Bridge was a symmetrical, three-semicircular-arch structure constructed in granite with a Portland stone balustrade and obelisks on each of the four corners.
When the bridge was reopened c.1882 it was renamed for Daniel O'Connell when the statue in his honour was unveiled.

The River Liffey flows through the centre of Dublin. Its major tributaries include the River Dodder, the River Poddle and the River Camac. The river supplies much of Dublin's water and a range of recreational activities. It rises in The Wicklow Mountains and flows 125km.