Change of guard at the entrance to Guarda Nacional Republicana, the National Republican Guard or GNR. Members of the GNR are military personnel, subject to military law and organization responsible for the preventive police and highway patrol in the countryside and small towns of Mainland Portugal, customs enforcement, coastal control, nature protection, search and rescue operations and state ceremonial guards of honor.

The Lisbon tramway network, in operation since 1873, presently comprises six urban lines. In 1901 the network was electrified. The decline of the network began with the construction of the Lisbon Metro but the six remaining lines are still very important as sections of the city's topography can only be crossed by small trams.

The Lisbon tramway network, in operation since 1873, presently comprises six urban lines. In 1901 the network was electrified. The decline of the network began with the construction of the Lisbon Metro but the six remaining lines are still very important as sections of the city's topography can only be crossed by small trams.