Yusuf Islam is the most famous convert to Islam in the world and one of the most successful pop stars of the 70s. Now, the man known to millions as Cat Stevens is back on tour in Germany. By Hans Joachim HennigMore
The Ottoman Empire, founded in 1299, collapsed in November 1922, when the last sultan, Mehmed VI, was sent into exile. The First World War had been a disaster for the empire, with British and allied forces capturing Baghdad, Damascus and Jerusalem. A new government, the Turkish Grand National Assembly, was set up in 1920 in Ankara, which then became the Turkish capital. Constantinople, formerly the imperial capital, was renamed Istanbul in 1930.