Documents, entry requirements & customs (visas, etc)
Detailed information necessary for foreigners who want to visit Portugal and Lisbon in particular could be found here.
Money and currency
Being a part of the European Union and the Euro zone, Portugal adopted the common European Currency Euro (symbol: €) in 2002.
Health and travel insurances
A good travel and health insurance in case of any accidents or sickness during the stay in Portugal, in particular, in Lisbon is required. European Health Insurance Card (EHIC): It enables holders to access medical resources when travelling outside of their EU country of residence.