The Assembly of the Republic, commonly referred to as simply Parliament, is the unicameral parliament of Portugal. According to the Constitution of Portugal, the parliament "is the representative assembly of all Portuguese citizens". The constitution names the assembly as one of the country's organs of supreme authority.

Lisbon is the capital and largest city of Portugal, with an estimated population of 548,703 as of 2022 within its administrative limits and 2,871,133 within the metropolis. Lisbon is mainland Europe's westernmost capital city and the only one along the Atlantic coast, the others being on islands. The city lies in the western portion of the Iberian Peninsula, on the northern shore of the River Tagus. The western portion of its metro area, the Portuguese Riviera, hosts the westernmost point of Continental Europe, culminating at Cabo da Roca.