The area that today includes the Palace of Justice and Praça de Parada Leitão [Parada Leitão Square] was, in the Middle Ages, occupied by the Bishop and the Cordoaria Nova [The ropery building], where cables were made for ships.
In the reign of Filipe II, it was transformed into the Alameda do Olival [Olive Grove Lane], the first landscaped garden of Porto, and later into a nineteenth century garden ("Jardim de João Chagas").
The Alameda do Olival was also used for fairs, such as the S. Miguel Fair, founded in 1682 and held on 29 September, later replaced by a row of stalls in front of the Cadeia da Relação [Jailhouse], which disappeared with the creation of the Anjo Market [Angel market].
The Innkeeper’s Mutiny of 1757 took place in the Alameda do Olival, and in 1809 Brigadier Luís de Oliveira da Costa was murdered here, accused of being a Jacobin.
As far as we know, the name Campo dos Mártires da Pátria, dating back to 1835, is a tribute to the Porto people who were hanged in 1757.