The introduction of objects of historical interest into the museum's Inventory began in 1977. The objects were grouped into 4 categories:

• modern historical objects: photographs, written and printed documents on cultural history, stone, clay, wood, textile utensils (more than 600 items);

• jewellery: silver or other metal objects and assemblages of objects, brooches, bracelets, medallions, jewellery boxes, snuff and ashtrays, silver cups, rosaries and other works (about 50 pieces); 

• numismatics: about 500 banknotes, nearly 400 silver coins (from antiquity to the dualism period), copper, bronze, other alloy minted coins, stamp impressions (2181 pieces in total);

• weapons: 64 firearms, 54 cutting and striking weapons, as well as defensive and defensive equipment (136 pieces in total).

Some items from the old historical collection were included in the first museum exhibition in 1930. The collectors were Géza Vámszer, Péter Domokos Pál and Imre Nagy, who were also the main figures in the founding of the museum. The later collections were made by Gyula Vécsei, Pál János, János Szőcs and others, mainly in the Ciuc basin, Ghimeș and Cașin. In the 1980s, artifacts confiscated by the Harghita County Economic Police were also brought to the museum. Over the years, the collection has also been enriched by donations and purchases. 

In 2012, the scientific research that laid the foundations for the previously planned exhibition on the history of the city began. By now, this collection of local history objects from the 19th and 20th centuries has enriched the museum's historical collection, and part of it is now part of the permanent exhibition on the history of the city of Miercurea Ciuc, entitled At Crossroads, which has been open to the public since the summer of 2018.