Château de Pierre Scize

About

The Château de Pierre Scize or Château de Pierre Encise is a now-demolished fortress in Lyon. It was built on a strategic location in the Middle Ages, facing the Saône at the western entrance to the city, the border between the Holy Roman Empire and the Kingdom of France. Home to the archbishop of Lyon and used as a state prison by Louis XI, it was finally demolished in 1793 after the French Revolution. The rocky outcrop on which it was built was originally named "Petra incisa", meeting "split stone" or "cut stone", possibly recalling Agrippa's major works to build a Roman road through it. According to Clerjon (1830), the spur of Pierre Scise used to reach as far as the middle of the Saône.

Geology: The Pierre Scisse spur is part of the crystalline base layer on the edge of the Massif central. On the heights overlooking the castle, this granite is covered by the sedimentary massif of Les Monts d this slope corresponds to an exhumed fault line scarp. The crystalline lowest level is found...