Delo (Дело, Labour) was a monthly magazine published in Saint Petersburg, Russia, from mid-1866 till January 1888. Led formally by Nikolai Shulgin (1866—1879) and informally by Grigory Blagosvetlov, Delo was seen as an ideological heir to Russkoye Slovo (edited by the latter and closed by the authorities after Dmitry Karakozov's assassination attempt) and until 1884 remained one of the two (alongside Otechestvennye Zapiski) most radical Russian publications of the time.