The city was founded in 1517, when it was named Franciscopolis after Francis I of France, and subsequently named Le Havre-de-Grâce (hence Havre de Grace, Maryland). Le Havre simply means the harbour or the port. Its construction was ordered to replace the ancient harbours of Honfleur and Harfleur whose utility had decreased due to silting.
LeHavre is France's second-largest port, after Marseile, and its name in fact means 'the Harbour'.
LeHavre was rebuilt after WWII according to the designs of one single architect, Auguste Perret, who famously said "concrete is beautiful".
There are three ferries a day to LeHavre from Portsmouth in England, or overland transport from all over France will deposit you at either the gare routière or gare SNCF in the east end of town.