 Around the same time , the count focused on two other projects : the first grew out of his longstanding interest in promoting literature and sciences , and the second , more ambitious aim was to fight for the gradual abolition of slavery . When in 1867 Pedro II openly asked for the gradual eradication of slavery in his Speech from the Throne , Porto Alegre was one of the few individuals who supported him , sending him a letter of congratulation . On 18 June 1869 , the Partenon Literário ( Literary Parthenon ) , a spiritual successor to the Historic and Geographic Institute of the Province of São Pedro , was created and Porto Alegre was made an honorary member . In one of its sessions , the count , who had already embarked on a plan of gradually freeing his own slaves , proposed the creation of a civil association devoted to slavery 's abolition . His idea was not only welcomed , but came to fruition . The Sociedade Libertadora ( Liberation Society ) was founded on 29 August , with Porto Alegre as its president , its primary purpose being the purchase of freedom for enslaved children . 
