One of the signs describing the Paris metro history and which was set to commemorate 100 years of the Metro.
The current sign describes the secondary entrances to the metro stations
The next photo taken the day before shows the entrance to the station where the sign (Bréguet - Sabin) was taken Click for a larger image
It is likely that the sign refers to the entrance where the element that was photographed a few months later appears at the small entrance to the Cité metro station Click for a larger image
RATP - Régie Autonome des Transports Parisiens - Autonomous Parisian Transportation Administration Translation of the text on the sign
100 years of the metro (1900-2000)
Small entry Guimard
In 1899, the architect Hector Guimard was responsible for designing all the entrances to the metro then under construction. He chose a material that was both economical and noble, cast iron, and offered several models of surrounds: covered entrances for large stations, main accesses equipped with masts in the shape of sprigs of lily of the valley, and secondary accesses like here, without signage.
The cartridges which adorn the balustrade are typically Art Nouveau, but here they are hollowed out. Their fluid shapes imitate nature, taking inspiration from the plant or animal world.
Today, only 88 Guimard station entrances remain which have been classified as Historic Monuments.