The nickname of the Great Bell at Westminster, cast in 1858, is often said to honor commissioner of works Sir Benjamin Hall. What is it?

Completed in 1825, which New York waterway cost more than $7 million to build? Completed in 1843, the column in London's Trafalgar Square is topped by a statue of which naval hero? Completed in 1849, the Chain Bridge over which river linked the cities of Buda and Pest? Completed in 1856, California's first railroad ran 22 miles between Sacramento and which future prison town? Completed in 1869, which waterway has been nicknamed "the Highway to India"? Completed in 1914, which canal provides a shortcut between the Atlantic and Pacific oceans? Completed in 1916, which Russian railroad is the longest in the world? Completed in 1930, which William Van Alen skyscraper in New York City is in the Art Deco style?