Bridge of Sighs Bridge of Sighs The Bridge of Sighs (Italian and ) is a bridge located in Venice, northern Italy. The enclosed bridge is made of white limestone, has windows with stone bars, passes over the Rio di Palazzo, and connects the New Prison ("Prigioni Nuove") to the interrogation rooms in the Doge's Palace. It was designed by Antonio Contino (whose uncle Antonio da Ponte had designed the Rialto Bridge) and was built in 1600. The view from the Bridge of Sighs was the last view of Venice that convicts saw before their imprisonment. The bridge's name, given by Lord Byron as
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