Very close to Plaza del Comercio is the great town square, which houses the City Hall building. Built 1865-1880 according to project architect Parente Domingues da Silva, it occupies the same place as a former palace that was destroyed by fire (November 19, 1863). This building was proclaimed the Republic of Portugal on October 5, 1910 and consummated after the regicide of Charles I in 1908. It can be visited on the 2nd and 4th Sundays of each month, in the morning 9:30-12:30.
The Republic Assembly is the legislative body of the Republic of Portugal, it's a unicameral, has 230 members and its headquarters are in the Palácio de São Bento, Lisbon. This Palace is a neoclassical and became the headquarters of the Portuguese Republic in 1834, the year in which the religious orders were banned. It was built in the sixteenth century as a Benedictine monastery but at present, due to various reforms in the nineteenth and twentieth centuries, we see a new building, with little resemblance to the previous. This palace was included in the 2002 list of National Monuments. In the rear of the Palace is a villa and some beautiful gardens visible from the tram, where the official residence of the Portuguese Prime Minister is.