In BC 180, Tiberio Sempronio Graco, Roman governor, raised the siege against the Celtiberian, to help Carauis which was allied to Rome.
It was taken by Alfonso I, the king of Aragon, called the Fighter in 1119.
Its first master was Peter of Atares, between 1135 and 1146, who left the town to the order of St. John and the Temple. Nevertheless, in 1151, by means of an agreement signed by Mrs. Taresa, who was Peter of Atares’ mother, with Ramon Berenguer IV and the order of the Temple, Mrs. Taresa renounced to her properties so Magallon became a royal town (that means property of king).
Other well-known masters are: Blasco Maza (1154-1185) and Michael of Holy Cross (1195-1198).
In 1171 there was a catastrophical flood of the Huecha.
In 1236, James I granted the town to Zeyt Abuzeyt, the Muslim king of Valencia who was dethroned by James I, King of Aragon, called the Conqueror.
In 1271 Magallon’s Jewry paid its taxes (which in 1404 was reached to 30 "sueldos" (the Aragonese money in the Middle Ages)).
In 1305, in the Mudejar church of St. Mary of Orchard of Magallon, the peace at Monteagudo was ratified between Castille and Aragon and here the frontier line was set on the Mediterranean coast.
About 1347, Guido Lasteyria, general vicar of diocese of Saragossa, entrusted the collection of the archiepiscopal room of Magallon, to friar Hugh of Lich, who was a monk and inhabitant of Exea.
At the end of 1362, Magallon was captured by Castilian troops throughout the course of war called war of two Peters.
The town and the castle was taken in 1360 by Peter I, King of Castille during the war between Aragon and Castille called “the war of two Peters”. They were recovered by Peter IV, King of Aragon, and they were given to Beltran Duguesclin as a reward because of his service to the king.
In 1375, the same king gave to the town the privilege of a market and after that Magallon couldn’t be separated from the Crown; however, John I gave it to his wife Violante of Bar as a present.
In 1376, customs were established in Magallon on the frontier with Castille and Navarre. Fish, cattle, leather and wheat went into Aragon. Meanwhile, Mediterranean spices (like ginger, cinnamon, pepper,...), articles of clothing, drapery, shoes, fruits, jewellery, playing cards,... went out of Aragon.
In 1411, the Aragonese Parliament, which held a meeting in Alcañiz, voted for a special subsidy of 20,000 florins to buy Magallon and Borja so they were included decisively into the royal heritage.
In 1434 Magallon’s Jewry asked for permission to repair its synagogue which was under a ruinous condition.
In 1436, a point to collect tolls was established in Magallon for the frontier trade with Castille and Navarre.
In the second part of the XV century, Magallon’s Jewry (where lived about 120 Jews) had an autonomous hospital attached to the synagogue and the houses of Salomon de la Rasa. This hospital was transfered to Michael Coll, town nobleman, by the “Justicia” Peter Navarro, and the judge of the Holy Office John Francés, commissars of the deportation, in 30th May 1492 with other eight houses to paid back a tax of the Jewish quarter of 5,700 sueldos of property and 275 of annual income.
In 1495 population was 860 inhabitants.
In 14th October 1515, the king of Aragon, Ferdinand I granted Magallon the place called “Lo Realenco” (an ancient property of Novillas which borders on Boquiñeni, Gallur, Mallén, Gañarul and Novillas municipal areas).
In 1547, there was an agreement between the organist Thomas Puch and Domingo Tarín, who was ordered to finish the vessels of an organ by 1,260 sueldos jaqueses.
In 14th February 1555, it produced a catastrophical swell of the Huecha.
About July 1706, Magallón, which was a faithful village to the archduke Charles, suffered a brief siege from citizens of Borja (about 500) and troops from the Philip of Borbon dynasty (next Philip V of Castille).
In 1724, the hospital of Magallon, whose foundation is unknown, was recuperated by Augustine Sasa in order to aid the feverish and poor ill people.
In 1850, Madoz told us that Magallon had 400 houses, paved streets, two squares, a Town Hall with prison, a hospital for 6 ill people which had as managers and administrators: Victor Broce, Manuel Pérez Jaime and doctor Peter Linares; an all boys' school with 60 pupils, two all girls' school with 40 pupils, three brick factories, four potteries, a flour mill and eight oil mills. The richness of the town council was estimated at 462,600 reales and the population was 2,044 inhabitants.
On 29th June 1871, a catastrophical swell of the Huecha occured.
In 1882 the population was 2,948 inhabitants and in 1887 it was 2,831 inhabitants.
On 27th May 1889 the Borja-Cortes railway line was inaugurated with a railway station in Magallon which worked until 7th April 1955.
In 1900 the population was 2,813 inhabitants.
On 3rd May 1910 a catastrophical swell of the Huecha occured which reached two metres in the near village of Agon.
In 1950 the population was 2,098 inhabitants.
In May 1955 a catastrophical swell of the Huecha occured.
In February 1990, during the works building the deviation road it was discovered that in the mount Quez, the biggest Islamic burial ground of Aragon (the second of Spain) with eighty graves of XII century.
In 1991 the population was 1,365 inhabitants.
On 26th September 1992 a catastrophical swell of the Huecha occured.
On 14th January 2001 the UNESCO declared Aragonese Mudejar as Mankind Heritage; this declaration includes to Dominicans Convent of Magallon.