Often referred to as the black card, The American Express Centurion Card is a highly exclusive credit card issued by American Express. The black card was launched in October 1999 and is made of real titanium. Contrary to popular opinion, spending limits are imposed, however these limits can vary between cardholders and are not publicly disclosed. The card is available on an invite-only basis, and all potential applicants are required to have a minimum of $250,000 in annual spending.AskMen.com: Get an Amex Black Card (February 2008)

It has been reported that the Black Card is the most exclusive and expensive card in the world. With annual fees reported to be $2,500 with an additional $5,000 just for an initiation fee. http://www.bankrate.com/finance/credit-cards/credit-cards-for-the-rich-american-express-centurion.aspx Exact details hard to come by since American Express is very quiet about exact details. AMEX publishes a glossy magazine for their wealthy card holders that is full of high priced luxury items.

American Express Centurion Card cardholders enjoy a large number of benefits, including:

1. A personal concierge to assist with dining, shopping, and other needs
2. A travel agent to arrange all airfare, hotels, and rental cars
3. Upgraded status on select airlines such as Delta Air Lines, US Airways, Northwest Airlines, and more
4. Upgraded status in select hotels
5. Personal financial assistance
6. A subscription to the exclusive cardholder only Black Ink magazine