Cunard Line celebrates a milestone tomorrow when a prefabricated section of the keel will be lowered into the building dock of Queen Victoria at the Fincantieri shipyard in Marghera, Italy. The second largest ship ever built by the line is scheduled to enter service in April 2005, 15 months after Queen Mary 2. Both Queen Victoria and Queen Mary 2 will join the most famous ship in the world - Queen Elizabeth 2 - as part of the Cunard fleet. The first ship for Cunard built in Italy, Queen Victoria is being constructed at Fincantieri's Marghera yard near Venice. To date, the company has built more than 7,000 vessels, including many for Cunard's parent Carnival Corp.