Titanic Memorial Garden. A memorial garden has been unveiled in Belfast to commemorate those who died when the Titanic sank 100 years ago. Wreaths were laid by Lord Mayor Niall O Donnghaile; by Jack Martin, great nephew of John Simpson and a third wreath by David McVeigh on behalf of shipbuilders Harland and Wolff. The garden, situated in the grounds of Belfast City Hall, features the only monument in the world to list the names of all those who died.