1547-1584), like a number of other rulers across history – most famously the Caliph Haroun al-Rashid – was wont to go among his people in disguise to get a sense of what they were thinking, an early ...

La plus ancienne de ces maisons, particulièrement active, est la bibliothèque personnelle du calife abbasside Haroun ar-Rachid de Bagdad qui s'ouvre aux savants probablement avant 830, sous le règne d ...