The canton of Solothurn or canton of Soleure is a canton of Switzerland. It is located in the northwest of Switzerland. The capital is Solothurn. The foundation of the village of Salodurum took place in the time of the Roman emperor Tiberius. The territory of the canton comprises land acquired by the former town, mainly in the Middle Ages. For that reason the shap…The canton of Solothurn or canton of Soleure is a canton of Switzerland. It is located in the northwest of Switzerland. The capital is Solothurn. The foundation of the village of Salodurum took place in the time of the Roman emperor Tiberius. The territory of the canton comprises land acquired by the former town, mainly in the Middle Ages. For that reason the shape of the canton is irregular and includes two exclaves along the French border, separated from the rest of the canton by Basel-Land, which form separate districts of the canton. In 1481, the canton became a member of the military alliance of the former Swiss confederation. At the end of the Reformation, Solothurn maintained its Catholic religion. Between 1798 and 1803 the canton was part of the Helvetic Republic. In 1803 Solothurn was one of the 19 Swiss cantons that were reconstituted by Napoleon. In 1830, the population rebelled against the aristocratic regime and the canton became definitely liberal-democratic. Even though the population was strictly Roman Catholic, Solothurn did not join the Catholic separatist movement in 1845–7. Similarly, the federal constitutions of 1848 and 1874 were approved. The current constitution of the canton dates from 1987.