title: Woolwich
context: Woolwich (/ˈwʊlɪtʃ, -ɪdʒ/) is a district of south-east London, England, within the Royal Borough of Greenwich. Originally a town in Kent, it has been part of the London metropolitan area since the 19th century.[1] In 1965, most of the former Metropolitan Borough of Woolwich became part of Greenwich Borough, of which it remains the administrative centre.
question: When did Woolwich become a district of London?
answers: 19th century