1,464 to 1,532: In 68 years, the territories of Yungay were absorbed by the expansion of the INCA EMPIRE  , under the conduction of the Incas Pachacutec, Tupac Yupanqui and Huayna Cápac . In this period, the incan influence in the technical, social and cultural aspects was intense in all of the Huaylas Valley. The Inca Huayna Cápac sealed to the union of the Huaylas region with the Inca Empire  when marrying to the daughter of the Cacique of Huaylas called, Contarhuacho , who had a daughter , the same that being sister of the Atahualpa Inca, at the end of November of 1532 became the wife of Don Francisco Pizarro . Previous to the marriage, the princess was baptized with the name of Ines Huaylas Yupanqui. In that time Incas already glimpsed the strategic position of this territory because in Yungay the ways were crossed for communicated with Cajamarca to the North, Pachacamac (Lima) to the South, Valley of Conchucos and Huanuco to the East and Casma to the West.

It is possible that before the arrival of the Incas, these land already had the name of YUNGAY, the one that YUNGA comes from the voice quechua  with meaning "warm Valley", but the letter Y that added to an adjective means "on". It is to say to the old inhabitants pre-Incas realized of which this land was not exactly a zone yunga because the climate was tempered, own of zones limit superior to the Yunga region, is for that reason they baptized it like YUNGAY that means "Valley upon the warm place" or "tempered climate Valley" .

21 of January of 1533: Don Hernando Pizarro, who traveled coming from Cajamarca whit direction of the Sanctuary of Pachacamac, arrives to Yungay. According to the chronicle of Miguel de Estete, they traveled of the town of Guayllasmarca (Huaylas) to the "valley under maizales and small towns of one and another part of the way, they   went to sleep to two leguas from there to place called town Imigay or Yungay."
The name of Imigay appears a single time in history, apparently because days before (17 of January of 1533) the chronieler had been in a warm place called Imiga (present Yuracmarca) and when arriving at place between warm and cold ,He added the letter "Y" , which means “The head of imiga”

09 of September of 1533: Mr. Francisco Pizarro, arrives at “delightful valley” spending the night in “place  denominated Yungay”

04 of August of 1540: The Spanish foundation of Yungay

Pre-Incaica time: According to sage person Antonio Raimondi  “Yungay, has been founded on the ruins of another old town, being observed important rest of construction, previous to the conquest (Spanish), in the called Huansakay hill, located near the pantheon”.

Time of the colony: The City of Yungay the 04 of August of 1.540 with the name "Elegant, Noble and Heroic Villa de Yungay ", the same day, by initiative of Fray Domingo of Santo Tomás , also was founded the Convent and the Church that were located in the center of the old city. The City of Yungay was founded by the Dominican monks under the invocation of Santo Domingo de Guzmán, by such reason for Administrative porpuse  (intentions Distributions and Groups of judges) it also was known it with the name “Santo Domingo de Yungay “

. 08 of June of 1542 , the governing Vaca de Castro , meets in “ city of Yungay “ with the loyal forces to the Spanish crown, first with Captain Alonso de Alvarado and later with Pedro captains de Alvarez Holguín, Gomez de Tordoya and Garcilazo de la Vega, soon to march towards the south to fight the rebel "Amagro El Mozo" to whom they defeat in the battle of Chupas.

The importance of the city of Yungay, in the beginnings of the colony is reflected when “by order of the Viceroy Toledo (1571), the first reductions settled down (Concentration of populations) that were in the Department of Ancash, with Huaraz at the top of the Hanan Huaylas and Yungay at the top of the Hurin Huaylas... “, under the supervision of the Commissioner of the Virrey Don Alonso of Santiago of Valverde

In 1545 , and it celebrated in Lima the First one I capitulate Provincial, rising to the Convent from Santo Domingo de Yungay to the Category of Vicarage, and later in 1579, to the category of Priorato.

17 of Julio of 1585: The Archbishop Toribio Alfonso de Mogrovejo, celebrates in Yungay the third Diocesano Synod .

30 of November of 1614: Ilustrious Lady Yungaina Doña Ines de Salas Vda de Lopez Villoso, makes donation testamentary of their properties of Chorrillos (80has) and Santa Catherine (100 has), with the intention of which the rents that they generated these lands are used for the education of the Yungainos young people.

Based on this  donation, in Yungay it worked the FIRST SCHOOL OF ANCASH and one of first ones of the Virreynato.

In order to safeguard the properties, the Municipality of Yungay made the First inscription of dominion in the Public Registry of Ancash the 02 of August of 1,900. I title that one has become to reinscribir in this Registry with date 29 of September of the 2004

The 15 of July of 1.949 with DL 11073, the Military Junta of Government, confiscated the Property Santa Catherine transferring it to the Branch military. From that date the Yungainos we demanded its return.

06 of January of 1725: Violent earthquake that produced the snow sliding from Monte Huandoy . To see detail

03 of February of 1774: Revolt of the resident's of the stay of Tumpa against the Spanish Regime.

08 of 1819 July: The Judge of the Province of Huaylas Don Felipe Antonio Alvarado (1812 to 1820) in his secret report to the Intendant of Tarma inform of the taking of conscience and rise of the town of Yungay against the slavery, writing: “ That of the indictment that it is being followed, are anything nothing less than to have vociferated the Indians in the streets of that town which they were free of all the pensions of tithes, tributes, primicias, marriages and oleos, because San Martín was already close and  nothing had to do” .