[angkor]

Muslims sacked Rome around 850AD and entirely occupied Sicily from about 900AD to 1100AD.

Early Islam in Italy

[Mackey]

From the page you linked:

In 846 Arabs appeared at the mouth of the Tiber. Their fleet forced its way past the fortifications at Ostia and moved on Rome. The great church of St. Peter was sacked but the city was not taken.

Very interesting. Thanks!