Separated as it is into two parts by the river Liffey, Dublin has its fair selection of bridges along the length of the river. Until comparatively recent times (the 18th century) Grattan Bridge between Capel and Parliament Streets was the most easterly bridge, the river below that remaining as a wide estuary with no fixed crossings. After the building of the Custom House further down the river, new bridges were added and the river closed in by the Quays. Until the later end of the twentieth century the last bridge was Butt Bridge at the Custom House allowing ships access to the quays. In recent years the addition of the fixed Memorial Bridge and the opening toll bridge in the docklands has helped close the river off to all but small river craft.