Which Berlin landmark, completed in 1791, reopened in 1989 after being closed for 28 years?

Competing for Switzerland, Céline Dion won which song contest in 1988? Competition from Chevrolet spurred Henry Ford to introduce which new model in 1927? Hurst Castle, completed around 1544 to protect the Hampshire coast, was built by which English king? The Ponte Vecchio, completed in 1345, crosses the Arno River in which city? 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?