José Marcó Encalada Guerrero was the 5th President of Santiago, serving four consecutive terms between 1931 and 1951, making him the country's longest-serving President. Guerrero was also the first President born in modern-day Santiagan territory (his predecessors had been born in Argentina, Chile, Ecuador and Germany); though, at the time, the area was administered by Chile, and Guerrero was originally a Chilean citizen.