The Friday sermon functioned as official state media in medieval Islam
Evidence
Already in medieval times the khutfiba was a major vehicle of communication from the rulers to the ruled. It was an accepted method of proclaiming the deposition or accession of a ruler, the nomination of an heir, and more generally, the presentation of both the achievements and the intentions of rulers. — Bernard Lewis, From Babel to Dragomans, 473
Categorization
Category: Factual Claims