Austria has had a checkered history when it comes to relations with Muslims, but its 100-year-old Law on Islam is seen as a symbol of tolerance.
The law gives Muslims the same rights as other officially recognised religions in Austria, such as Catholicism, Lutheranism, Judaism and Buddhism.
At the weekend senior members of the Austrian government and the country's Islamic Community attended ceremonies to mark the centenary.
So Islam has been an officially recognised religion in Austria for 100 years.
Yet another historical event is probably more familiar to most people - the 1683 Siege of Vienna, when the Muslim Ottoman army's advance on Christian-controlled Europe was halted. [BBC] Read more