They have a page with their history (http://www.semana.com/wf_InfoHistoria.aspx http://www.semana.com/wf_InfoHistoria.aspx) that says that they started in 1946

They have a page with their history (http://www.semana.com/wf_InfoHistoria.aspx http://www.semana.com/wf_InfoHistoria.aspx) that says that they started in 1946 aiming to "create a new independent magazine with no political colours, in order to fill the analysis void left by the newspapers, which are too busy with the day-to-day news". They were closed in 1961 because they put Fidel Castro on the cover, and reopened in 1983. I'll stay neutral on this one and let you decide what they are...