The Avenida da Liberdade, as well as the Restauradores Square, have their origins in a public park ("Passeio Público") inaugurated in the area in 1764. Projected by Pombaline architect Reinaldo Manuel, the park was initially surrounded by a high wall. It was revamped in the 1830s and 1840s by architect Malaquias Ferreira Leal, who introduced a new arrangement of the flora as well as fountains, a waterfall and statues. The allegoric statues representing the Tagus and Douro rivers still existing in the boulevard of the Avenue date from this time.