The public baths of the legionary fortress, the Thermae Maiores, were discovered during the first excavations in Aquincum in 1778 when one of the bath's halls came to light. István Schönvisner, the director of these investigations, published his results in the same year under the title "De Ruderibus Caldariique Romani". Soon after its recovery, this section of the baths was displayed to the public in a special protective construction.

Today, the baths of the Aquincum legion are known almost in their entirety known. These ruins may be visited in the Bath Museum that opens from the Flórián Square pedestrian subway.

Within the walls of these baths that opened to the fortresses main roads on two sides, one could pursue all sorts of physical activities as well as body cleansing. A gymnasium, pools with cold, lukewarm and hot water, a sweat chamber and spacious, centrally heated halls served the refreshment and fitness of soldiers.