Paul-Henri Spaak: NATO Secretary General 1957-1961 (nato.int)

• Spaak was Belgian Prime Minister and Foreign Minister before becoming NATO Secretary General.
• He also presided over the UN General Assembly and the Council of Europe.
• Succeeded by Dirk Stikker in 1961, he returned as Belgium's Foreign Minister.

"Biographical overview of Paul-Henri Spaak, Belgian statesman who served as NATO Secretary General from May 1957 to April 1961. The article details his political career including roles as Prime Minister, Foreign Minister, and involvement in European institutions. It highlights his leadership during NATO's early years and his subsequent return to Belgian politics."