19:00Unearthing MysteriesSeries 2Episode 4: The Pharos Lighthouse of AlexandriaBBC Radio 7 Duration: 30 minutes Sat 21st Feb 2009, 19:00 on BBC Radio 7Professor Aubrey Manning investigates the fate of one of the most impressive and enigmatic buildings in history.GenresFactualHistoryFormatsDocumentariesBrandUnearthing MysteriesSeriesUnearthing Mysteries: Series 2 Source: BBC Online