Zalău (, unofficial and former official name: (; or , , ) is the seat of Sălaj County, Romania. In 2011, its estimated population was 56,202. History Ancient times Zalău is situated in the area inhabited by "Free Dacians", away from the historical landmark of Porolissum, a well-preserved Roman Castrum with an imposing fortress, an amphitheater, temples, houses and a customs house in the ancient Roman province of Dacia. Zalău was the crossing point between Central Europe and Transylvania, along the so-called "Salt Route". Archaeological discoveries revealed evidence of human existence in this area since the Neolithic, approx. 6500 years ago. Dacian coins found in archaeological perimeters of the city central area and on the Valea Mâții, west of the city, plus important items belonging to Roman culture, are evidence of free Dacian continuity in this area and of developing economic relations with the Roman ancient city of Porolissum. After the conquest of Dacia by Trajan (106), the Roman Empire border stood atop the Meseș Mountains, just away from the city. Just north from the border, on the actual Zalău city area were the free Dacians tribes, and to the east, south-east (of Meseș Mountains) were Roman border fortifications, towers, walls, ditches and defense sides. Middle Ages The first written mention about Zalău, was in the "Gesta Hungarorum", also called the "Chronicle of Anonymous" (probably notary of the King Béla III of Hungary), published around year 1200. According to this source, Zalău settlement would have been there as early as around 900. Later, Zalău is referred to as Villa Ziloc in 1220, Zylac in 1246, Zylah in 1282, Zyloh and oppidum Zylah in 1318, Zila in 1601, Zilahu in 1808, Sziláj / Szilágyi in 1839, Szilaju in 1850, and Zalău / Sziláju / Walthenberg in 1854. After the great Mongol invasion, which destroyed the city in 1241, Zalău came in 1246 under the administration of the Catholic Bishopric of Oradea. The trusteeship was maintained until 1542, when Zalău became part of Principality of Transylvania. On 1 August 1473 Matthias Corvinus, king of Hungary and Bohemia, acknowledged Zalău as a market town for the first time (called oppidum Zilah – Zilah fort), a privilege that freed the city from the county domination, granted its citizens the right of free trade and gave it a larger degree of economic autonomy. At the end of the 16th century, the city had an independent