administrative leadership, composed of 33 elected senators (one of whom was the mayor), a notary, a registrar and a treasurer. Other important events in the development of the city occurred in 1571 during the reign of Prince Istvan Bathory and in 1600 under the reign of Michael the Brave. After Transylvania had been annexed to the Habsburg Empire, the city experienced an economic decline due to the infusion of products from Western Europe. After Michael the Brave's victory in the Battle of Guruslău on 3 August 1601, Zalău received administrative, legislative, fiscal and military own rules, which provided real autonomy freedoms to citizens. A chronicle from the 17th century, first mentioned the main crafts of city residents: belt-makers, potters, wheelwrights, shoemakers, butchers, tailors, blacksmiths, carpenters, hat makers and armorers. The city was under the rule Principality of Transylvania between 1526 and 1660. It was also controlled by the Ottomans between 1660 and 1692, the city being part of Varat Eyalet. The Calvinist college was formed in the first half of the 17th century. On 9 November 1714, Charles XII of Sweden rested for a night in a building on Király street (now named after Corneliu Coposu) with an acquaintance György Zoványi as is indicated by a notice still on the house. Until the administrative reform of 1876, the city had been the seat of Közép-Szolnok for centuries. Modern times Zalău is one of the most important urban centers in the region. It had a Reformed college (Wesselényi College), a township school for civil service (for boys only), and a national civil school (for girls only). It had the largest hospital in the region and a tax revenue office. In 1850, it held a population of 4,294 and, in 1910–8,062 (7,477 Hungarians, 19 Germans, 529 Romanians and 23 belonging to other ethnic groups). By religion, there were 1,333 Roman Catholics, 873 Greek Catholics, 5,363 members of the Reformed Church, and 415 Jews. The city had 1,427 households, and most of its inhabitants were employed by the manufacturing industry. The Reformed Church was built in 1246. It is one of the city's oldest buildings and one of the largest in Eastern Europe. In 1876, Zalău became the seat of the Szilágy County. After the proclamation of the Union of Transylvania with Romania (1 December 1918), by the Treaty of Trianon Zalău has been part of Romania – except between 1940 until the