The paper was founded by João Carlos de Almeida Carvalho and was first published on 1 July 1855, at that time targeted mainly at the inhabitants of the town of Setúbal rather than the surrounding areas.

On 27 December 1857 it said farewell to its readers with the following:[2] Sincere and fervent defenders of the progress of our country, and of the interests of our land, we have often suffered abuse and arbitrariness, we have censured drowsiness so that we would not fall into torpor and, thus, we have had to go through hardships that we preferred to swallow, rather than betray the sacred duties that we have entrusted to us.The name was resurrected in 1916.

In June 1918 Trindade was briefly arrested by the government of Sidónio Pais but released without interrogation after having been held overnight.

The paper, still with Republican principles, was closed down on 5 February 1927 by the Estado Novo dictatorship, having been given a 15-day suspension for publishing without first seeking approval of the censors.

In August 1927, it returned to the newspaper stands, with the subtitle Diário Republicano da Noite (Republican Evening Diary), which would continue to be used until 1938 when Domingos Tavares Roque became editor.

[2][3] On 2 January 1945, the header of the newspaper began to name Diniz Bordalo-Pinheiro as director, with Domingos Tavares Roque as editor.

On Bordalo-Pinheiro's death, he was replaced by his son, Carlos, who was in charge of the paper during the April 1974 Carnation Revolution that overthrew the Estado Novo.

In the subsequent and often confusing revolutionary context, the paper would reflect the great political disputes that were taking place in the country and, particularly, in Setúbal.