Which Canadian city is known for its historical shipping magnate Samuel Cunard?

The city notably associated with the historical shipping magnate Samuel Cunard is Halifax. Cunard was a prominent figure in the 19th century, founding the Cunard Line, which became known for its passenger and cargo shipping services across the Atlantic Ocean. He was born in Halifax in 1787, and the city played a significant role in his early life and career. Because Cunard's origins and substantial contributions to the shipping industry are closely linked to Halifax, it is recognized as the city that honors his legacy and achievements in maritime transportation.

The other options, while significant Canadian cities, do not have the same historical connection to Samuel Cunard. Vancouver and Toronto, for instance, have their own rich histories and contributions to Canada but are not specifically tied to Cunard. Montreal, although an important city in Canadian history, is not directly associated with him in the same way that Halifax is, making Halifax the correct answer for this question.