You can start with this website http://nigeria.usembassy.gov/ A letter of invitation is usually advised. They may also need to show strong ties to their country, such as family, a job, home, a bank account.
Quick Answer. Over one billion Muslims live in Asia, which makes it the continent with the highest Muslim population. Indonesia is the country with the largest Muslim population, with 209 million people. Continue Reading.
Mosque in Moscow In the mid 7th century AD, as part of the Muslim conquest of Persia, Islam penetrated into the Caucasus region, parts of which were later permanently incorporated by Russia. The first people to become Muslims within current Russian territory, the Dagestani people (region of Derbent), converted after the Arab conquests in the 8th century.