Porrentruy is in the world of the Obscure Cities, a small town in the north-west of the Continent, remarkable for the way its buildings are set on the edge of breath-takingly high cliffs. The Musée des Ombres is located there 1). Its rivers provides water to large parts of Sodrovno-Voldachia 2). Mary played here with the Robertson Circus. This is also where she met Stanislas Sainclair of L'Echo des Cités 3).
Porrentruy is also a city in German Pruntrut, in the Swiss canton of Jura.