Bridge of Sighs (Cambridge) Bridge of Sighs (Cambridge) The Bridge of Sighs in Cambridge, England is a covered bridge at St John's College, Cambridge University. It was built in 1831 and crosses the River Cam between the college's Third Court and New Court. The architect was Henry Hutchinson. It is named after the Bridge of Sighs in Venice, although they have little architecturally in common beyond the fact that they are both covered. The bridge, a Grade I listed building, is one of Cambridge's main tourist attractions and Queen Victoria is said to have loved it more than any other spot in the city.
Limestone kilometers. The world's largest limestone quarry is at Michigan Limestone and Chemical Company in Rogers City, Michigan. Limestone is very common in architecture, especially in Europe and North America. Many landmarks across the world, including the Great Pyramid and its associated complex in Giza, Egypt, were made of limestone. So many buildings in Kingston, Ontario, Canada were, and continue to be, constructed from it that it is nicknamed the 'Limestone City'. On the island of Malta, a variety of limestone called Globigerina limestone was, for a long time, the only building material available, and is still very frequently used on