Panama Canal
Colombia, France, and later the United States controlled the territory surrounding the canal during construction. The US continued to control the canal and surrounding Panama Canal Zone until the 1977 Torrijos–Carter Treaties provided for handover to Panama. After a period of joint American–Panamanian control, in 1999, the canal was taken over by the Panamanian government. It is now managed and operated by the government-owned Panama Canal Authority.
Territories of the United States on stamps
The Panama Canal opening was commemorated on its 25th anniversary with a 3-cent stamp issued on August 15, 1939. The stamp shows a steamship passing through the Gaillard Cut, President Theodore Roosevelt on the left promoted the canal and General George W. Goethals on the right was chief engineer and first governor of the Panama Zone.