Who received invitation to groundbreaking ceremony for 1915 World Fair?

The invitation to the groundbreaking ceremony for the 1915 Panama-Pacific International Exposition in San Francisco was sent to various dignitaries, including President Woodrow Wilson, California Governor Hiram Johnson, and other prominent figures from government, business, and the arts. The event was significant for celebrating the completion of the Panama Canal and showcasing advancements in technology and culture. Many influential leaders and notable citizens attended to mark this historic occasion.