Like Christians and Jews, Muslims believe in only one God. Today about four million Muslims
live in Germany alone. Islam has its origins in Arabia.
All in all about 1.6 billion Muslims live in more than one hundred countries all over the world.
Islam is especially widespread in Indonesia, Pakistan, India and other Southeast Asian countries.
Most Muslims, however, live in Arab countries such as Iraq and also in Iran and Afghanistan.
After Christianity, Islam is the second-largest religion in the world.