Karl Renner was an Austrian politician and lawyer, born on December 14, 1870. He played a significant role in the establishment of the First Austrian Republic after World War I. Renner served as the country's first Chancellor and later as its President, contributing to the drafting of the new constitution and promoting social reforms. Renner was a member of the Social Democratic Party of Austria and was known for his efforts in advocating for workers' rights and social justice. He remained active in politics until his death on December 31, 1950, leaving a lasting impact on Austrian political life.