Emirate of Sicily conquer Castrogiovanni (the modern Enna, where Euphemius died) and retreated back to Mazara. In 830 they received a strong reinforcement of 30,000 Ifriqiyan and Andalusian troops. The Iberian Muslims defeated the Byzantine commander Teodotus in July–August of that year, but again a plague forced them to return to Mazara and then to Ifriqiya. The Ifriqiyan units sent to besiege Palermo managed to capture it after a year long siege in September 831. Palermo became the Muslim capital of Sicily, renamed al-Madinah ("The City"). The conquest was a see-saw affair; with considerable resistance and many internal struggles, it took over a
Capital city as Dresden, Wiesbaden, Mainz, Düsseldorf, Stuttgart, and Munich, as do all of the republics of the Russian Federation. The national capitals of Germany and Russia: the Stadtstaat of Berlin and the Federal City of Moscow, are also constituent states of both countries in their own right. Each of the States of Austria and Cantons of Switzerland also have their own capital cities. Vienna, the national capital of Austria, is also one of the states, while Bern is the ("de facto") capital of both Switzerland and the Canton of Bern. Many national capitals are also the largest city in their respective