Jack Martin 12, a descendant of Dr John Simpson who perished on the Titanic, with Belfast Lord Mayor Niall O'Donnghaile after unveiling a plaque in the new memorial garden at Belfast City Hall on the 100th anniversary of the sinking of the Titanic. PRESS ASSOCIATION Photo. Picture date: Sunday April 15, 2012. A minute's silence was held as the memorial was opened in Belfast. A great, great nephew of the ship's doctor helped unveil bronze plaques listing more than 1,500 passengers, crew and musicians who died when the liner struck an iceberg and sank in the North Atlantic on April 15 1912. See PA story ULSTER Titanic. Photo credit should read: Paul Faith/PA Wire