In addition to the two existing town halls, the third town hall was built in 1702. In 1724 the Electoral Saxon Post Office was built and in 1744 the new school at the market. Prussia received some Albertine lands after the Congress of Vienna in 1815, including Cölleda. With the transfer of the district administration from Wiehe to Cölleda in 1824, Cölleda was elevated by royal cabinet order to the status of district town of the newly established District of Eckartsberga in the Merseburg administrative district of the Province of Saxony. The year 1824 also marked the beginning of the cultivation of medicinal herbs, especially peppermint, which gave Cölleda the nickname "Peppermint Town" in 1830. In 1848, during the March Revolution, civil defence units stood up to the Prussian military and forced the soldiers to withdraw from the town. On 22 September of that year, a popular assembly took place in Cölleda, in which 15,000 people from Cölleda, Sömmerda and the surrounding villages are said to have participated. This assembly was an expression of a popular movement that had forced the expropriation of the large estates in two neighbouring communities of Sömmerda and their division among the peasants and day labourers. However, the movement was put down and one of its leaders and 70 other people from the region were sentenced to 25 years in prison each. In 1857, the district savings bank was established. The "Saal-Unstrut-Eisenbahn-Gesellschaft" (SUE), founded in Cölleda in 1870, opened the Straußfurt-Großheringen railway line in 1874. ("peppermint railway"); with it, Cölleda also received a telegraph station. Seven years after the railway line was put into operation, the stagecoach service was discontinued in 1881. In 1884, the district administration office was built. The well was connected to the newly built water supply from the Backleber spring in 1890.