Until the 1990s the state had a monopoly on TV broadcasting, so RTP1 and RTP2 were the only Portuguese channels, both with similar generalist programmes. In 1990, RTP1 was renamed "Canal 1", and in 1992 RTP2 was renamed "TV2". With the creation of the two private channels, SIC in 1992 and Televisão Independente in 1993, the philosophy of the public service changed: in 1995, "TV2" was again renamed RTP2 and became an alternative channel dedicated to culture, science, arts, documentaries, sports (except football), minorities and children. Since then, RTP2 has carried no advertising. Canal 1, renamed back RTP1 also in 1995, remained the commercial channel of RTP group, focused on entertainment, information and major sport competitions. In 2004, after a great restructuring period, RTP started its current branding. That year the two thematic channels of the group were also created—RTPN, a 24 hour-news channel which became RTP Informação in 2011 and RTP3 in 2015; and RTP Memória, dedicated to classic RTP programming. In 2014 the headquarters of RTP2 were transferred from Lisbon to Porto.