The Praça do Comércio is a large, harbour-facing plaza in Portugal's capital, Lisbon, and is one of the largest in Portugal, with an area of 175 by 175 m, that is, 30,600 m2. Facing the Tagus to the South, the plaza is still commonly known in Portuguese as Terreiro do Paço(, as it hosted the Paço da Ribeira until the latter was destroyed by the great 1755 Lisbon earthquake.