Ceratocystis platani is a fungus that causes a disease on plane trees in the genus Platanus, mostly in North America and Southern Europe.
Affected trees in Agde, Southern France (2014)
The Canal du Midi is a 240 km (150 mi) long canal in Southern France. Originally named the Canal Royal en Languedoc and renamed by French revolutionaries to Canal du Midi in 1789, the canal is considered one of the greatest construction works of the 17th century.
The Orb Aqueduct, which allows the Canal du Midi to cross the river Orb in Béziers
Portrait of Pierre-Paul Riquet, the designer of the Canal du Midi
Photograph of the Letter, Archives of the canal, Toulouse