Footbridge of Memory, Memorial in Warsaw, Poland.

The Footbridge of Memory on Chłodna Street consists of two pairs of over ten-metre poles on both sides of the street, clad in silicon bronze to resemble the wooden beams of the 1942 bridge. Four 27-metre optical fibres stretch between them, marking the line of the footbridge deck and railings. The installation was designed by Tomasz Lec and unveiled on 1 October 2011.

A wooden footbridge was built in 1942 as a temporary connection between the larger and smaller sections of the Warsaw Ghetto. This crossing remained in place until the ghetto was liquidated later that year.

Four stereoscopes are mounted in the two poles on the northern side of Chłodna Street. Inside them visitors see three-dimensional photographs of the wooden bridge and hear tramcars passing, footsteps on the bridge stairs and a Jewish cantor singing. The ghetto residents called the structure the Bridge of Sighs, because from it they could see the part of Warsaw closed to them.

The installation stands on Chłodna Street at its junction with Żelazna, on the eastern stretch rebuilt in 2010–2011. Four stereoscopes are mounted in the two poles on the northern side of Chłodna, where 3D images of the bridge and recorded sounds can be viewed. The fibre-optic lines and the shadows cast by two small screens fixed at a height of eight metres are visible after dark, when the illumination is switched on.

Two small screens mounted eight metres up cast shadows that make it look as though people are still walking across the bridge. The designer, Tomasz Lec, intended the structure to read differently in sunlight, in rain and after dark, when white light lines mark an empty space in the air.