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.
Ancón, Panama
During the years when the Panama Canal was under the control of the United States, many administrative facilities, military bases, and communities were built in the adjacent areas, forming part of the former Panama Canal Zone. When these areas were reverted to Panama under the Torrijos-Carter Treaties, several alternatives were proposed to integrate the district to the city of Panama. The current district of Ancón was created when a new political-administrative division for the reverted areas was adopted, by Act No. 18 of August 29, 1979, and later amended by Law No. 1 of October 27, 1982. The areas located in the Pacific sector became part of this district, while those located on the Atlantic side were incorporated into the district of Cristobal, in the province of Colon. They remain characterized by a strong US urban architectural style.