A public lecture is one means employed for educating the public in the arts and sciences. The Royal Institution of Great Britain has a long history of public lectures and demonstrations given by prominent experts in the field. In the 19th century, the popularity of the public lectures given by Sir Humphry Davy at the Royal Institution was so great that the volume of carriage traffic in Albemarle Street caused it to become the first one-way street in London. The Royal Institution's Christmas Lectures for young people are nowadays also shown on television. Alexander von Humboldt delivered a series of public lectures at the University of Berlin in the winter of 1827–1828, that formed the basis for his later work Kosmos.