During the Russian industrial revolution in the late 19th century, Kyiv became an important trade and transportation centre of the Russian Empire, specialising in sugar and grain export by railway and on the Dnieper river. By 1900, the city had also become a significant industrial centre, having a population of 250,000. Landmarks of that period include the railway infrastructure, the foundation of numerous educational and cultural facilities, and notable architectural monuments (mostly merchant-oriented). In 1892, the first electric tram line of the Russian Empire started running in Kyiv (the 3rd in the world).