Step by step the old moat had to be filled in and moved. The area between the two walls was generally referred to as the Zwinger and, in the vicinity of the castle, was utilised by the royal court at Dresden for garden purposes. The location of the so-called Zwingergarten from that period is only imprecisely known to be between the fortifications on the western side of the city.[1][2] Its extent varied in places as a result of subsequent improvements to the fortifications and is depicted differently on the various maps.