February 21: Language Movement Day in Bangladesh; International Mother Language Day * 1613 – Mikhail I was elected unanimously by the Zemsky Sobor to become Tsar, beginning the Romanov dynasty in Imperial Russia. * 1804 – Built by Cornish inventor Richard Trevithick, the first self-propelled steam engine or locomotive first ran in Wales. * 1848 – The Communist Manifesto by communist theorists Karl Marx and Friedrich Engels was first published, becoming one of the world's most influential political tracts. * 1958 – British artist Gerald Holtom designed a logo for the Campaign for Nuclear Disarmament that became more commonly known as the peace symbol. * 1971 – The Convention on Psychotropic Substances, a United Nations treaty designed to control psychoactive drugs, was sig