Protective archaeological research was carried out in 2007. at the location Preradovićeva 14 in Varaždin, where the extension of the the First Gymnasium - high school was planed. They covered the part of the buried eastern ditch that was part of the defense system of Varaždin City from the mid. 15th to the early 19th century. Archaeological research has largely confirmed the available historical data on the town’s ditches system, and its backfilling at the beginning of the 19th century, as well as the results of earlier research on similar locations in the City of Varaždin. Interestingly, the level of ground in this location was about 170 cm lower than today’s up to the 1970s, and was relatively late aligned with the streets and surrounding plots. The reason we can find in the fact that this plot was enclosed by a stone wall and used as a gymnasium garden, and obviously earlier there was no need for aligning it. The most interesting archaeological layer was the eastern ditch itself, where a large amount of archaeological finds were found. The fragments of ceramic vessels are certainly the most numerous finds found during these researches, and most of them belong to ceramic vessels used for everyday use, but we also have waxed and painted fragments also.