Currency:
Euro is the Portuguese currency. There are coins of 1, 2, 5, 10, 20 and 50 cents, 1 and two euros, and 5, 10, 20, 50, 100, 200 and 500 euros notes.
Only the banks are allowed to do exchanges, and they generally operate from 8.30 to 15.00, being closed on weekends and holidays. You can use credit cards in shops that have affixed their acceptance.