This photograph is of President Jimmy Carter and First Lady Rosalynn Carter walking with Prime Minister Margaret Thatcher of the United Kingdom out of the Yellow Oval Room through the Center Hall. Karl Shumacher took this picture on December 17, 1979. President Carter wore a black tuxedo, a pleated dress shirt, and a black bow tie. Notched lapels, though considered the least formal lapel style, were particularly trendy at the time, and black remained the standard color for formal wear. While Carter was known for his casual Southern style, he recognized the significance of dressing formally for diplomatic occasions. A strong supporter of State Dinners, Carter hosted 40 during his presidency, including the largest in White House history at the time with over 1,340 guests.