Question: What building in the London Docklands lays claim to being the site of the oldest riverside tavern? 
Context: The London Docklands Development Corporation (LDDC) was a quango agency set up by the UK Government in 1981 to regenerate the depressed Docklands area of east London.  During its eighteen-year existence it was responsible for regenerating an area of 8.5 sqmi in the London Boroughs of Newham, Tower Hamlets and Southwark.  LDDC helped to create Canary Wharf, Surrey Quays shopping centre, London City Airport, ExCeL Exhibition Centre and the Docklands Light Railway, bringing more than 120,000 new jobs to the Docklands and making the area highly sought after for housing.  Although initially fiercely resisted by local councils and residents, today it is generally regarded as having been a success and is now used as an exemplar of large-scale regeneration, although tensions between older and more recent residents remain. Cyprus is a station on the Docklands Light Railway (DLR) located in Cyprus, to the south of Beckton, in the Docklands area of Newham, east London.  The station serves the University of East London Docklands Campus and the eastern end of the north quay of the Royal Albert Dock. Wapping ( ) is a district in London Docklands, England, in the London Borough of Tower Hamlets.  It is situated between the north bank of the River Thames and the ancient thoroughfare simply called The Highway.  Wapping's proximity to the river has given it a strong maritime character, which it retains through its riverside public houses and steps, such as the Prospect of Whitby and Wapping Stairs. London Docklands is the name for the riverfront and former docks in London, capital of the United Kingdom, based around east and south east London respectively.  It forms part of the boroughs of Southwark, Tower Hamlets, Lewisham, Newham and Greenwich.  The docks were formerly part of the Port of London, at one time the world's largest port.  They have now been redeveloped principally for commercial and residential use.  The name London Docklands was used for the first time in a government report on redevelopment plans in 1971 and has since become virtually universally adopted.  It also created conflict between the new and old communities of the London Docklands. The Museum of London Docklands (formerly known as Museum in Docklands) is a museum on the Isle of Dogs, East London that tells the history of London's River Thames and the growth of Docklands.  The museum is part of the Museum of London jointly funded by the City of London Corporation and the Greater London Authority. The Prospect of Whitby is a historic public house on the banks of the Thames at Wapping in the London Borough of Tower Hamlets.  It lays claim to being the site of the oldest riverside tavern, dating from around 1520. The Kentish Hotel is a tavern in Waiuku, New Zealand that lays claim to the longest continuous liquor licence in the country.  The Kentish Hotel has stood the test of time as being one of the most famous established watering holes in the Franklin area since it was first granted its licence to sell liquor in 1853. Docklands (also known as Melbourne Docklands to differentiate it from London Docklands) is an inner-western suburb of Melbourne, Victoria, Australia, 2 km (1.2 mi) from Melbourne's Central Business District.  Its local government area is the City of Melbourne.  At the 2016 Census, Docklands had a population of 10,964. Baltic Quay is a large residential development, located in Surrey Quays in the London Borough of Southwark.  Completed in 1989 during the London Docklands Development Corporation, it is largely known for its unique architecture, which won it awards from the London Docklands Development Corporation.  As a result, it is considered to be a landmark development in the area. Docklands Light Railway rolling stock is the passenger trains and service vehicles (collectively known as 'rolling stock') used on the Docklands Light Railway (DLR), which serves the London Docklands area in the east of London.
Answer: Prospect of Whitby