The Leon Trotsky House Museum is a museum honoring Leon Trotsky and an organization that works to promote political asylum, located in the Coyoacán borough of Mexico City. The center of the complex is the house where Trotsky and his second wife, Natalia Sedova, lived from April 1939 to August 1940, and where Trotsky was murdered. Trotsky's teenage grandson, Vsevolod Volkov (aka Seva Volkov, Esteban Volkov), also lived with Trotsky and Sedova at the house from August 1939 to August 1940. The house has been kept as it was at that time, especially the study in which Ramón Mercader killed Trotsky with an ice axe to the back of the head. Around the house is a garden and high walls with watchtowers. The complex was turned into the current museum and asylum institution in 1990, on the 50th anniversary of the assassination.