The following is a timeline of the history of the city of Aarhus, a city in central Denmark.
Viking Age
750–800 – Aarhus is founded by the northern shore of the Aarhus River. c. 900 – The first church, the Holy Trinity Church, is built during the reign of Frode, King of Jutland. c. 900 – Gorm the Old fortifies Aarhus with ramparts. 10th century – Harald Bluetooth strengthens and expands the ramparts. 948 – First mention of Aarhus as the bishop of Aarhus Reginbrand attends the Synod of Ingelheim. 988 – Diocese of Aarhus is dissolved. 1035–42 – Harthacnut coins money stamped with the original name of Aarhus: "AROS". 1043 Svend Estridsen gains support from Aros in war against Magnus the Good and a battle between the two are fought in the Bay of Aarhus. Magnus the Good becomes ruler of Aarhus for a period and coins money inscribed "Magnus Konge, Lif-sig i Aros" in latin. 1050 – Harald Hardrada attacks Aarhus and burns the settlement including the Holy Trinity Church. 1060 Diocese of Aarhus is reestablished as Svend Estridsen divides the country into 8 bishoprics. Crypt church is constructed on the site of the former Holy Trinity Church and present day Church of Our Lady.
Middle Ages
1080 – The crypt church is expanded and dedicated to Saint Nicholas. 12th century The bishopric begins collecting tithe. The defensive ramparts are strengthened and a cobbled ring road built along it. 1134 – The bishop of Aarhus Ulkil is killed at the Battle of Fotevik in support of King Niels. 1180 Saint Nicholas Church mentioned as the first cathedral of Aarhus. Niels of Aarhus dies and is buried in Aarhus. 1191 – Peder Vognsen is appointed bishop by King Canute VI. c. 1192 – Construction begins on Aarhus Cathedral on the burial site of Niels of Aarhus. 1195 – Aarhus Cathedral School is mentioned for the first time. The school possibly predates the Aarhus Cathedral. 13th century – Valdemar II builds a grain mill at Aarhus River and hand grinders are made illegal. c. 1250 – Dominican friars are given Saint Nicholas Church which they tear down and begins construction on Church of Our Lady. 1298 – King Eric VI grants the Diocese of Aarhus rent from the peasantry enlisted in leidang. 1441 – Christopher of Bavaria ratifies existing market town privileges. 1477 – Christian I grants citizens of Aarhus rights to fisheries in Lillebælt, Kalø Vig and Jutland. The defensive ramparts ringing the town since the Viking age are removed. 1483 – King Hans ratifies that citizens of Aarhus are free of duties and may trade in all markets in Jutland. 1496 – King Hans ratifies that citizens of Aarhus may use all fisheries in Jutland.
Renaissance 16th – 18th century
1505 – King Hans establishes a four-mile exclusion zone around Aarhus within which only citizens may trade with farmers. 1542 – Large fires break out destroying parts of present Indre By. 1546 – Parts of the city burns down as fires breaks out. 1556 – Large fires breaks out. 1627-1629 – Aarhus is occupied by Albrecht von Wallenstein's troops on behest of Ferdinand II during the Thirty Years' War. 1637 – Thors Mølle is constructed as a powder mill. 1644-1645 – Occupation by Swedish troops during the Torstenson War 1657 – Wooden city walls erected as octroi is introduced. 1657-1659 – Aarhus is occupied during the Dano-Swedish wars of 1657–58 and 1658–60. 1659 Aarhus is bombarded by 13 Swedish warships during the Dano-Swedish War of 1658–60. Plague breaks out in the city. Nationwide a third of the population is killed. 1662 – The medieval fiefs reformed into counties and Aarhus County is established. 1672 – 3,474 inhabitants. 1740 – New citizens council established, composed of the wealthiest citizens. 1794 – Århus Stiftstidende is published for the first time.