The Pioneer Barracks was built between 1897-1898 on the site of a former monastery located on the entire eastern side of the barrier that delineated the Alba Carolina fortress and was named after the Austrian Emperor Franz Joseph. The four sides of the barrage led to the formation of a large inner courtyard.
During the First World War the building was used as an Austro-Hungarian military deposit, but in the autumn of 1918 it was one of the first and most important military units in Alba Iulia fortress taken over by Romanian soldiers.