Pont Neuf
Despite its name, the Pont Neuf is the oldest surviving bridge across the river Seine in Paris, although it has been extensively altered and repaired since it was opened to traffic in 1604.
It has two separate spans, one of five arches joining the left bank to the Île de la Cité, another of seven joining the island to the right bank.
For extensive information, see Wikipedia entry.
' Sawing the Pont Neuf. ... at the present moment much interest is being taken in the construction of two trenches the whole length of the Pont Neuf for the laying of tramways on the slot system. The Pont Neuf is one of the oldest and most strongly built stone bridges in Paris. The arches support huge blocks of stone which would take an interminable time to cut in the ordinary way, and the bridge is therefore being sawn by the system usually employed in quarries where the stone is cut by endless wires passing over pulleys and rollers. From an electric motor coupled to a driving drum the cables pass over pulleys on a high standard about a hundred yards away, and then return under rollers in pits sunk to the depth of the trench. Four cuttings are made by the cables with wet sand to a width of about 4ft. and a depth of 6ft. Holes are drilled with pneumatic tools, and the stone is broken up with the cold chisel and sledge hammer. The work is slow and costly, but it is unavoidable in view of the refusal of the Paris authorities to tolerate overhead wires within a certain radius of the Opera.'[1]