ابن حوقل
The Arabs initiated land reforms that increased productivity and encouraged the growth of smallholdings, a mere dent in the dominance of the landed estates. The Arabs further improved irrigation systems. With about 300,000 inhabitants, Palermo in the 10th century was the most populous city in Italy. A description of the city was given by Ibn Hawqal, a Baghdad merchant who visited Sicily in 950. A walled suburb called the Kasr (the citadel) was (and remains) the center of Palermo, and the great Friday mosque stood on the site of the later Roman cathedral. The suburb of Al-Khalisa (Kalsa) contained the sultan's palace, baths, a mosque, government offices, and a private prison. Ibn Hawqal reckoned there were 7,000 individual butchers trading in 150 shops.