The Ha'penny Bridge, known later for a time as the Penny Ha'penny Bridge, and officially the Liffey Bridge, is a pedestrian bridge built in May 1816 over the River Liffey in Dublin, Ireland. Made of cast iron, the bridge was cast in Shropshire, England.

A footbridge is a bridge designed solely for pedestrians. While the primary meaning for a bridge is a structure which links "two points at a height above the ground", a footbridge can also be a lower structure, such as a boardwalk, that enables pedestrians to cross wet, fragile, or marshy land. Bridges range from stepping stones–possibly the earliest man-made structure to "bridge" water–to elaborate steel structures. Another early bridge would have been simply a fallen tree. In some cases a footbridge can be both functional and artistic.