Did you know that 1 in 3 women experience physical and / or sexual violence during their lifetime? There are 736 million women. Violence against women includes physical violence, psychological violence, sexualized violence and rape. At the very end of the spectrum we find femicide. Femicide is the most extreme form of violence against women and is defined as the murder of women because they are women. This background document addresses the history and definition of femicide, different types of femicide, and discusses Norwegian and international efforts to prevent violence against women in general and the murder of women and girls specifically. The document has been prepared by Aleksandar Rakanovic Storøy and Julie Falck Husum in relation to the 16-days of activism against gender-based violence.