sentences:  During a political career spanning three decades, he was three times Speaker and, from 1854 to 1856 Joint Premier of the Province of Canada.Dundurn Castle was built between 1832–1835 for Sir Allan Napier MacNab, and named after his family ancestral seat in Scotland.Incorporating an existing farmhouse, it was designed by local architect Robert Wetherell as a statement of its owner's place in society.