Later, in the 2nd century AD,  the city gained murray bridge dating status of a colonia as Colonia Aurelia Napoca. Napoca became a provincial capital of Dacia Porolissensis and thus the seat of a procurator.
The colonia was evacuated in by the Romans. Gravure [a] of medieval Cluj by Georg Houfnagel At the beginning of the Middle Agestwo groups of buildings existed on the current site of the city: the wooden fortress at Cluj-Mănăştur Kolozsmonostor and the civilian settlement developed around the current Piaţa Muzeului Museum Place in the city centre.
During Gáspár Heltai 's service as preacher, Lutheranism grew in importance, as did the Swiss doctrine of Calvinism. The petition demanded the equality of the Romanian nation in Transylvania in respect to the other nations Saxon and Hungarian governed by the Unio Trium Nationumbut it was rejected by the Cluj Diet. At one point, the Austrians were gaining control of Transylvania, trapping the Hungarians between two flanks.
But, the Hungarian army, headed by the Polish general Józef Bemlaunched an offensive in Transylvania, recapturing Klausenburg by Christmas In this latter period, the government granted equal rights to the ethnic Romanians, but only briefly.
Inthe Diet in Cluj abolished the laws voted in Sibiu, and proclaimed the Law concerning the Union of Transylvania with Hungary.
During this time, Kolozsvár was among the largest and most important cities of the kingdom and was the seat of Kolozs County. Ethnic Romanians in Transylvania suffered oppression and persecution. It asked for equal rights with the Hungarians and demanded an end to persecutions and attempts at Magyarisation.