Gustáv Husák (Slovak pronunciation: [ˈɡustaːu̯ ˈɦusaːk]; 10 January 1913 – 18 November 1991) was a Slovak politician, president of Czechoslovakia and a long-term Secretary General of the Communist Party of Czechoslovakia (1969–1987). His rule is known as the period of the so-called "Normalization" after the Prague Spring.