Bridge of Sighs a translation from the Italian "Ponte dei sospiri" in the 19th century, comes from the suggestion that prisoners would sigh at their final view of beautiful Venice through the window before being taken down to their cells. In reality, the days of inquisitions and summary executions were over by the time the bridge was built, and the cells under the palace roof were occupied mostly by small-time criminals. In addition, little could be seen from inside the bridge due to the stone grills covering the windows. The name "Bridge of Sighs" has since been applied by association to other bridges
Lutetian Limestone was the city's name in ancient times. Between the 17th and 19th centuries, Lutetian limestone was extracted by tunneling through hill-sides south of Paris. The stone comprises many of the grandest Paris buildings from the 17th century onwards, including parts of the Louvre, the Place de la Concorde and Les Invalides. Haussmann's grand renovation of Paris (1853-1870), which provided a sweeping and uniform style and an elusive coloring — ranging from bright white to butter-yellow to a dull nicotine-yellow/grey — for the city, relied upon buildings faced with Lutetian limestone. In the 20th century, open-cast quarries were developed which uncovered