Amsterdam Centraal (Dutch pronunciation: [ɑmstərˈdɑm sɛnˈtraːl]; abbreviation: Asd) is the largest railway station of Amsterdam, Netherlands. A major International railway hub, it is used by 162,000 passengers a day, making it the second busiest railway station in the country after Utrecht Centraal and the most visited Rijksmonument of the Netherlands.National and international railway services at Amsterdam Centraal are provided by NS, the principal rail operator in the Netherlands. Amsterdam Centraal is the northern terminus of Amsterdam Metro Routes 51, 53, 54, operated by municipal public transport operator GVB. It is also served by a number of GVB tram and ferry routes as well as local and regional bus routes operated by GVB, Connexxion and EBS. Amsterdam Centraal was designed by Dutch architect Pierre Cuypers and first opened in 1889. It features a Gothic, Renaissance Revival station building and a cast iron platform roof spanning approximately 40 metres. Since 1997, the station building, underground passages, metro station and the surrounding area have been undergoing major reconstruction and renovation works to accommodate the North-South Line metro route, which was opened on 22 July 2018. Amsterdam Centraal has the second longest railway platform in the Netherlands with a length of 695 metres.