ETNA SKETCHED BY EUGENE VIOLLET-LE-DUC

EUGENE VIOLLET-LE-DUC (1814-1879)

Mount Etna or Mongibello (3,329 m - 10,922ft) 

 Italy (Sicily) 

In Le cratère de l'Etna en Sicile, 1836, watercolor, Musée Lambinet Versailles, France  

The mountain 
Mount Etna (3,329 m - 10,922ft) or Mongibello, Mungibeddu in Sicilian, Aetna in Latin is an active stratovolcano on the east coast of Sicily, in the Province of Catania, between Messina and Catania. It lies above the convergent plate margin between the African Plate and the Eurasian Plate. It is the tallest active volcano in Europe. It is the highest mountain in Italy south of the Alps. Etna covers an area of 1,190 km2 (459 sq mi) with a basal circumference of 140 km. This makes it by far the largest of the three active volcanoes in Italy, being about two and a half times the height of the next largest, Mount Vesuvius. Only Mount Teide in Tenerife surpasses it in the whole of the European–North-African region. In Greek Mythology, the deadly monster Typhon was trapped under this mountain by Zeus, the god of the sky and thunder and king of gods, and the forges of Hephaestus were said to also be located underneath it.
Mount Etna is one of the most active volcanoes in the world and is in an almost constant state of activity. The fertile volcanic soils support extensive agriculture, with vineyards and orchards spread across the lower slopes of the mountain and the broad Plain of Catania to the south.
Due to its history of recent activity and nearby population, Mount Etna has been designated a Decade Volcano by the United Nations. In June 2013, it was added to the list of UNESCO World Heritage Sites.
- More informations about Mount Etna

The artist 
Eugène Emmanuel Viollet-le-Duc (not to be confused with the writer Violette Leduc) was a French architect and theorist, famous for his interpretive "restorations" of medieval buildings.  But he was, as well, an excellent but less famous watercolorist, sketching quite a number of mountains and volcanoes all over Europe.
Born in Paris, he was a major Gothic Revival architect. His works were largely restorative and few of his independent building designs were ever realised. Strongly contrary to the prevailing Beaux-Arts architectural trend of his time, much of his design work was largely derided by his contemporaries. He was the architect hired to design the internal structure of the Statue of Liberty, but died before the project was completed.
During the early 1830s, a popular sentiment for the restoration of medieval buildings developed in France. Viollet-le-Duc, returning during 1835 from study in Italy, was commissioned by Prosper Mérimée to restore the Romanesque abbey of Vézelay. This work was the first of a long series of restorations; Viollet-le-Duc's restorations at Notre Dame de Paris with Jean-Baptiste Lassus brought him national attention. His other main works include Mont Saint-Michel, Carcassonne, Roquetaillade castle and Pierrefonds.
Viollet-le-Duc's "restorations" frequently combined historical fact with creative modification. For example, under his supervision, Notre Dame was not only cleaned and restored but also "updated", gaining its distinctive third tower (a type of flèche) in addition to other smaller changes. Another of his most famous restorations, the medieval fortified town of Carcassonne, was similarly enhanced, gaining atop each of its many wall towers a set of pointed roofs that are actually more typical of northern France. Many of these reconstructions were controversial. Viollet-le-duc wanted what he called ‘a condition of completeness' which never actually existed at any given time. This approach to restoration was particularly problematic when buildings survived in a mixture of styles. For instance, Viollet-le-Duc eliminated eighteenth-century additions to Notre Dame. Both his theory and his practice were strongly criticized on the grounds that only what had once been in place should be reconstructed. At the same time, in the cultural atmosphere of the Second Empire theory necessarily became diluted in practice: Viollet-le-Duc provided a Gothic reliquary for the relic of the Crown of Thorns at Notre-Dame in 1862, and yet Napoleon III also commissioned designs for a luxuriously appointed railway carriage from Viollet-le-Duc, in 14th-century Gothic style.
Among his restorations were:
- Churches :
Notre-Dame in Paris, Abbey of the Mont Saint-Michel, Basilica of St. Mary Magdalene in Vézelay, St. Martin in Clamecy,  Sainte-Chapelle in Paris, Basilica of St. Denis near Paris, St. Louis in Poissy, Notre-Dame in Semur-en-Auxois, Basilica of St. Nazarius and St. Celsus in Carcasonne, Basilica of St. Sernin in Toulouse, Notre-Dame in Lausanne (Switzerland).
Town halls:
- Saint-Antonin-Noble-Val, Narbonne
Castles:
- Château de Roquetaillade in Bordeaux, Château de Pierrefonds, Fortified city of Carcassonne, Château de Coucy, Antoing in Belgium, Château de Vincennes in  Paris.
When monuments was to much damaged, he sometimes  obtain from the emperor Napoleon III the permission to entirely rebuilt it,  like he did in Avignon with the Popes ramparts all around the city.
Sources: 
- Encyclopedia Britannica