The city provided refuge to Arab and Muslim families evicted from Muslim Sicily (1061-1091) after the
Norman conquest. Some sources mention the migrations of the Muslim Sicilians to Khniss in the 10th and 11th centuries in two waves. In the neighboring Monastir, there is the tomb of the very famous Muslim scholar Sidi El Mezri originating from Mazara in Sicily. Traditionally, the economic activity of the city was based on olive farming, fishing, stone quarries (which left some of the neighboring landscapes disfigured), and on handcraft textile. Khniss specialized in wool processing and in weaving different sorts of high quality traditional woolen blankets, such as "ferrachia" and "abena"; dresses such as "
barnous" and "kedroun"; carpets, rugs and "Klim", etc. Nowadays, the local economy is more diversified, but still dominated by an important export oriented textile industry, mostly for ready-made clothing. With the modern structure of the textile industry, the traditional woolen textile activity, which missed on the latest innovations and technologies, got a severe shock and its economic importance has declined. There is a real threat that the traditional know-how in processing woolen textiles completely fades away. ==Geography==