Built in 1738 to house a Welsh charity school, this unassuming building is an interesting reminder of Clerkenwell's radical history. From here in 1902 and 1903, during his European exile, Lenin edited 17 editions of the Russian-language Bolshevik newspaper Iskra (Spark). In 1933, 50 years after the death of Karl Marx and around the time of the Nazi book burnings, it was decided that the building would be converted into a library to honour the founder of communism.
Copies of Iskra have been preserved in the library, along with other socialist literature, Spanish Civil War banners and relics from various industrial disputes. Tours visit the room where Lenin worked and the building's 15th-century cellar.
If you think it's odd that Clerkenwell should have a memorial to Marx, you might be surprised to learn that from 1942 to 1951 a bust of Lenin stood in Holford Sq in neighbouring Finsbury, gazing towards his former residence. After being repeatedly vandalised it was moved to Islington Town Hall, where it remained on display until 1996, when it was consigned to a museum.