Green's Bridge, or Greensbridge, is an elegant, Palladian-style, limestone arch bridge that crosses the river Nore in Kilkenny, Ireland. The bridge is a series of five elliptical arches of high-quality carved limestone masonry with a two-arch culvert to the east. Its graceful profile, architectural design value, and civil engineering heritage endow it with national significance. Historian Maurice Craig described it as one of the five-finest bridges in Ireland. It was built by William Colles and designed by George Smith, and was completed in 1766. The bridge was 250 years old in 2016.