Grenfell Centre, formerly known as Oracle House and JLW Building, nicknamed Black Stump, is a high rise office building located at 25 Grenfell Street in the Adelaide city centre, South Australia.

Grenfell Street is a major street in the north-east quarter of the Adelaide city centre, South Australia. The street runs west-east from King William Street to East Terrace. Its intersection with Pulteney Street is formed by Hindmarsh Square. On the west side of King William Street, it continues as Currie Street towards West Terrace.