Police were called to the scene shortly after 11am today.
Officers cordoned off Greyfriars Street in Oxford following reports a man appeared to have fallen from the roof terrace of the Westgate shopping centre.
Police say the man - who is in his 80s - has sadly died and the circumstances are being treated as unexplained but not suspicious.
A file is being prepared for the coroner.
South Central Ambulance also attended the scene earlier.
The man’s next of kin have been informed and Thames Valley Police says its thoughts are with them.