The Strasbourg Visionary and His Parisian Apprenticeship Born amidst the cultural richness of Strasbourg in 1752, Jean Frédéric Schall—also known as Frédéric-Jean, Challe, or Chall—emerged as a painter whose brush captured the very essence of an era transitioning between the dramatic weight of the Baroque and the airy lightness of the Rococo. His artistic journey began under the watchful eye of Johann Christian Richter, a master who im…