Linköping is possibly named after the Lionga ting assembly which according to Medieval Scandinavian laws was the most important thing in Östergötland. Exact location of the Lionga ting is not known, but it was along the Eriksgata. The term "-köping" means there was a market there.
Historically, Linköping is famed for being an early diocese, c. 1082, second in Sweden (within its pre-1658 boundaries) only to Skara. The diocese is first mentioned in 1104 in the so-called "List of Florence" (Lionga. Kaupinga). The monastery of Vreta Kloster near Roxen north of Linköping was established in 1128, and the oldest parts of the cathedral are also from the 12th century (although it has been changed many times since then, the eye-catching tower with copper roofing being a 19th-century product). On several occasions attempts to achieve a separate Swedish archdiocese were based in Linköping, although, when they finally were successful in 1164, Uppsala was chosen instead.
The coronation of Valdemar Birgersson took place in the cathedral in 1251. In the reign of Gustavus Vasa several important diets were held in the town.
Religious centers tend to become educational centers, and Linköping was no exception. A cathedral school can be traced from 1266. In 1627 the current Linköping cathedral school was established, making it the third oldest gymnasium in Sweden.
Also, Linköping was the site for the final settlement of the dispute between king Sigismund III Vasa and his uncle Duke Charles, the latter prevailing in the battle of Stångebro (the main bridge in Linköping) on 25 September 1598. This ultimately led to the rise to the throne of Charles (de facto at the 1600 Riksdag of the Estates meeting in Linköping and formally four years later) and the end of the short-lived Swedish-Polish personal union, as well as the execution of five of Charles's political opponents on the main square of Linköping on 20 March 1600.
Linköping was a small town until 1937, when the Saab aircraft industry was formed, starting a period of rapid expansion. Linköping University was established in the 1960s. Today the city is a center of high-technology and software industry.