Jozef Gašpar Tiso was a Slovak politician and Catholic priest who served as president of the First Slovak Republic, a client state of Nazi Germany during World War II, from 1939 to 1945. In 1947, after the war, he was executed for treason in Bratislava.

The (First) Slovak Republic, otherwise known as the Slovak State, was a partially-recognized client state of Nazi Germany which existed between 14 March 1939 and 4 April 1945 in Central Europe. The Slovak part of Czechoslovakia declared independence with German support one day before the German occupation of Bohemia and Moravia. It controlled most of the territory of present day Slovakia, without its current southern parts, which were ceded by Czechoslovakia to Hungary in 1938. It was the first time in history that Slovakia had been a formally independent state. Bratislava was declared the capital city.