Rossio Square has been a popular meeting place since the Middle Ages no matter the purpose. Both feasts and executions used to take place here. The official name, Praça Dom Pedro IV, refers to the Portugal king Pedro I of Brazil. Homage to this king is paid by a column installed in the centre of the square. On either side of this oval-shaped square, a monumental baroque fountain is placed.
This square is home to popular Café Nicola, which is housed in a beautiful Art Deco building. Another architecturally interesting sight is the neoclassical building of Dona Maria II National Theater.
Wikipedia https://en.wikipedia.org/wiki/Rossio_Square
More information http://www.golisbon.com/sight-seeing/rossio.html
Address Praça Dom João da Câmara 3, 1100-200 Lisbon, Portugal
Coordinates 38°42'49.61" N -9°8'21.703" E