The Puente de Hierro  or Iron Bridge was built in 1882 and is the oldest of the four bridges spanning the Ebro River as it passes through the Rioja capital.  It substantially improved Logroño’s commercial connections with northern Spain. The initiative for its construction must be attributed to Práxedes Mateo Sagasta. The design was the work of engineer Fermín Manso de Zúñiga. It is 330 metres long and rises eight metres above the level of the lowest waters.