The sheltered Portsmouth Harbour lies to the west of the island and the large tidal bay of Langstone Harbour is to the east.
Portsmouth is almost unique among British cities in having two cathedrals; the Anglican Cathedral of St Thomas, in Old Portsmouth, and the Roman Catholic Cathedral of St John the Evangelist, in Edinburgh Road, Portsea.
Portsmouth's regeneration is being continued in the city centre with the controversial demolition of the Tricorn Centre, a long abandoned shopping mall and car park, described as a "concrete monstrosity".
It is not the first time the 10th earl of Portsmouth has given money to the losing party in a libel case.
Yesterday Tolstoy said he was surprised at the earl's generosity, and had only met him twice before receiving a cheque for £350,000 followed by one for £26,000 in 1988.
The earl is a non-executive director of Grainger trust plc, whose principal activity is property investment and trading.