Plaza de Armas and water fountain of the city of Huanuco at, Peru,Huánuco is a Peruvian city, capital of the district, province and department of the same name in the north-central part of the country. It was founded on August 15, 1539 under the name of The Very Noble and Loyal City of the Knights of León de Huánuco, by the Spanish commander Gómez de Alvarado y Contreras,